{"title":"Dealer Weeks: Drivetrain Days","description":"\u003cp\u003eDealer Weeks · Week 5 (Sep 10–16). Buy the Master Chain Tool 1647\/2BBI and Master Link Pliers 1720\/4DP ring up free — add both to your cart. Plus buy 5, get 1 free on the selected in-stock drivetrain smalls below — chain wear indicators, bottom bracket tools, T-handle Torx drivers, three-way wrenches and cable housing cutters. Add 6 qualifying smalls and the lowest-priced one rings up $0.00 (repeats: 12 = 2 free). Out-of-stock sizes and variants outside the offer (T47 and Mega Evo sockets, T8\/T30 Torx, the 1643\/4 pro gauge) do not count. Applied automatically at checkout on the webstore — no code. While stocks last.\u003c\/p\u003e","products":[{"product_id":"cartridge-bottom-bracket-wrench","title":"Cartridge Bottom Bracket Wrench - 1671.8\/2BI-US","description":"\u003cp\u003eIf you're tired of your tool slipping out, look no further. The 1671.8\/2BI-US is the cartridge-BB tool we built for benchtop work that won't slip under load.\u003c\/p\u003e\n\u003cp\u003eThe body combines our \u003ca href=\"\/products\/cartridge-bottom-bracket-tool\"\u003e1671.1 cartridge wrench\u003c\/a\u003e with a 350 mm handle for leverage AND a double-threaded retaining screw that holds the tool against the BB cup as the wrench turns. The double-threaded screw threads into the axle and keeps the wrench from slipping and damaging the bottom-bracket nut.\u003c\/p\u003e\n\u003cp\u003eThe result is a tool that engages once, stays engaged, and doesn't cam out at the moment a stuck cup finally breaks loose.\u003c\/p\u003e\n\u003ch2\u003eHow it's used\u003c\/h2\u003e\n\u003cp\u003eInsert the 20-tooth socket end into the BB's splined recess until all 20 splines mesh fully. Thread the additional screw into the axle until the head is held in the cup; that is what keeps the wrench from slipping.\u003c\/p\u003e\n\u003cp\u003eApply force on the 350 mm handle in steady pressure. On English-threaded frames, which covers most bikes, the drive-side cup is left-hand thread and loosens clockwise; the non-drive cup is conventional right-hand thread. Once the cup breaks loose, finish winding it out with this wrench or switch to the 1671.1\/4 socket on a ratchet.\u003c\/p\u003e\n\u003cp\u003eThe retaining screw can either be hand-tightened (for routine removal where the cup isn't badly stuck) or driven with a 24 mm wrench (for cups that have been seized in place for years and need maximum engagement against the cam-out moment).\u003c\/p\u003e\n\u003cp\u003eThe handle can be removed from the socket head if you want to drive the 24 mm AF screw with a 24 mm wrench or a torque wrench; Unior says the handle can be taken down if necessary.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eShimano Octalink cartridge bottom brackets\u003c\/li\u003e\n\u003cli\u003eTruvativ cartridge bottom brackets\u003c\/li\u003e\n\u003cli\u003eShimano standard cartridge bottom brackets\u003c\/li\u003e\n\u003cli\u003eThe double-threaded screw is what lets the same head cover Shimano standard, Shimano Octalink, and Truvativ cartridge bottom brackets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e premium flex plus carbon steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e trivalent chrome plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle length:\u003c\/strong\u003e 350 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline count:\u003c\/strong\u003e 20-tooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e integrated handle (removable), double-threaded retaining screw, 24 mm wrench-flat on the screw for tool-driven snug\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The double-threaded screw that threads into the axle is the design call that earns this tool its keep on seized cartridge cups; Unior's service manual reaches for the 1671.8\/2BI when a socket alone cannot hold.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eRemovable handle is what makes this tool a genuine bench piece rather than just a longer wrench. On a torque-controlled install, take the handle down and drive the 24 mm AF screw with a torque wrench. Unior's service manual lists 50–75 Nm for square-cartridge cups and 50–70 Nm for Octalink cups. Reattach the handle for the next removal job; the tool covers both directions of the BB-service workflow.\u003c\/p\u003e\n\u003cp\u003eCranks come off before this wrench can reach the cups. For interface identification and the puller that precedes this job: How to remove a crankset →.\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhich bottom brackets does the 1671.8\/2BI-US fit?\u003c\/strong\u003e Unior lists Shimano standard, Shimano Octalink, and Truvativ cartridge bottom brackets. The double-threaded screw is what lets one head cover those axle types. It is not the 8-notch tool (that is 1671.2\/4) and it is not the wrench for Hollowtech II-style external cups (1671.5\/2BI or 1609\/2BI).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the retaining screw work?\u003c\/strong\u003e You thread the additional screw into the axle. That holds the wrench in the cup so it cannot slip and damage the nut. The screw is 24 mm AF and takes a 24 mm wrench or a torque wrench. Unior's official method is to thread the screw into the axle; the datasheet does not describe a self-adjusting spring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich way does a cartridge bottom bracket unscrew?\u003c\/strong\u003e On English-threaded frames, which is most bikes, the drive-side cup is left-hand thread and comes out clockwise; the non-drive cup is conventional right-hand thread. Italian-threaded frames use right-hand thread on both cups. Unior's service manual starts the job on the left side and reaches for this handled wrench when a socket alone cannot hold.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I take the handle off and use a torque wrench?\u003c\/strong\u003e Yes. Unior says the handle can be taken down if necessary. Drive the 24 mm AF screw with a 24 mm wrench or a torque wrench; the same procedure is used for installation. The service manual lists 50–75 Nm for square-cartridge cups and 50–70 Nm for Octalink cups.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":35720555987097,"sku":"624919","price":34.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1671.8_2bi-us.jpg?v=1787169355"},{"product_id":"adjustable-cup-wrench-1672-2","title":"Adjustable Cup Wrench - 1672\/2","description":"\u003cp\u003eCup-and-cone bottom brackets predate cartridge BBs by decades, and they're still on more bikes in service than the spec sheets suggest; older steel road bikes, city bikes, and rebuilt vintage frames almost all use them. The adjustable cup is the non-drive-side cup whose threading sets the bearing preload; on a well-set-up cup-and-cone BB, the cup's bearing pre-load is the single setting that determines whether the BB spins freely without play or grinds with side-load.\u003c\/p\u003e\n\u003cp\u003eThe 1672\/2 is the wrench that turns that adjustable cup. It's a flat-stock laser-cut tool with two engagement profiles on the same body: a pin spanner on one end for adjustable cups with two-hole engagement, and a flat-jaw wrench on the other end for cups with 16.5 × 31 mm flat bosses. One wrench covers both engagement patterns; on most vintage rebuilds, both end up in service on the same bench.\u003c\/p\u003e\n\u003ch2\u003eHow it's used\u003c\/h2\u003e\n\u003cp\u003eFor pin-spanner engagement: align the two pins with the cup's recessed holes (typical pin centre-distance is 27.3 mm; the wrench is sized to this). Hand-load the wrench against the cup's resistance; the goal is to set preload, not to crank torque. The bearing should spin freely with no axial play; a quarter-turn at a time is the right increment.\u003c\/p\u003e\n\u003cp\u003eFor flat-jaw engagement: seat the jaw across the 16.5 × 31 mm boss on the adjustable cup. Same preload-setting goal, same quarter-turn pace.\u003c\/p\u003e\n\u003cp\u003eThe adjustable cup locknut on the same side is a separate threaded ring; once preload is set, tighten the locknut against the cup to fix the setting. The 1672\/2 doesn't engage the locknut; a separate lockring wrench handles that.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable cups with two-hole pin engagement at 27.3 mm centre distance\u003c\/li\u003e\n\u003cli\u003eAdjustable cups with 16.5 × 31 mm flat bosses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for\u003c\/strong\u003e cartridge BBs (use the BB-specific socket or wrench instead) or external BBs (use the 16-notch wrench)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e premium flex plus carbon steel, hardened and tempered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 2.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 204 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin spanner:\u003c\/strong\u003e 27.3 mm centre distance between pins\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat-jaw wrench:\u003c\/strong\u003e 16.5 × 31 mm fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e trivalent chrome plated per ISO 1456:2009\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1672\/2 is a vintage-service tool that earned its place in the modern catalog because the bikes that use cup-and-cone BBs are still on the road, still in shops for service, and still need the right wrench. Forged-and-machined construction at 2.5 mm stock thickness gives the wrench the leverage to set preload cleanly without flexing under the hand-load that bearing preload wants.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eCup-and-cone preload is set by feel, not by torque value. The right call is “spins freely with no detectable axial play when you push and pull on the crank arm.” If the BB drags when you spin the cranks by hand, the preload is too tight; if you can feel knock when you push laterally on the crank arm, it's too loose. A quarter-turn of the adjustable cup at a time, with the locknut backed off, dials in the setting; tighten the locknut against the cup to fix it.\u003c\/p\u003e\n\u003cp\u003eFor the install \/ clean \/ replace decision tree across BB families: Replace or clean your bottom bracket →.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":35720590885017,"sku":"618414","price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1672_2.jpg?v=1787168839"},{"product_id":"master-chain-tool","title":"Master Chain Tool - 1647\/2BBI","description":"\u003cp\u003eMaster link pliers open and close the quick links that join most modern chains, and if that's the tool you need, we make a dedicated pair: the \u003ca href=\"\/products\/master-link-pliers-1720-4dp\"\u003eMaster Link Pliers\u003c\/a\u003e. What pliers can't do is cut a new chain to length or press a connecting pin straight. That half of a chain swap is what the Master Chain Tool is for.\u003c\/p\u003e\n\u003cp\u003eA worn chain quietly destroys the rest of your drivetrain. Push past the wear-indicator threshold and the elongated rollers carve your cassette teeth and round off the chainrings within a few hundred miles. The Master Chain Tool is the tool we reach for the moment a wear-checker drops in past spec, and the one we'd want on a stand at every shop that takes chains seriously.\u003c\/p\u003e\n\u003cp\u003eThis is the most complete chain tool in our range. The machined body and precisely-made spindle threads do the visible work; the floating chain support is the quiet detail that matters. It centers the chain plate against the driving pin on its own, so the pin pushes straight through every time. No coaxing, no off-center marks, no tweaked outer plates after reinstall.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe Master Chain Tool works with every derailleur chain from 6 to 13 speed. SRAM's AXS flat-top chains get their own dedicated support insert. Campagnolo 11-, 12-, and 13-speed chains are supported for peening; an included pin blocker handles the second half of the connection. For shop bikes and singlespeeds, the 1\/8″ support covers those too.\u003c\/p\u003e\n\u003cp\u003eThree interchangeable chain supports ship in the box: a single-link support (pre-installed), a wider double-link support for extra grip on stiff or fresh chains, and the dedicated AXS support. A hidden compartment in the body of the tool holds a replacement chain pin, which is where it'll be when you need it instead of the cassette drawer you swore it was in.\u003c\/p\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e6–13-speed derailleur chains; SRAM AXS flat-top; Campagnolo 11\/12\/13 peening; 1\/8″ single-speed\u003c\/li\u003e\n\u003cli\u003eMachined body, trivalent chrome plated\u003c\/li\u003e\n\u003cli\u003e89.5 × 42 × 191.5 mm\u003c\/li\u003e\n\u003cli\u003e560 g\u003c\/li\u003e\n\u003cli\u003eArticle number: 1647\/2BBI\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e three interchangeable chain supports (single-link pre-installed, double-link, dedicated SRAM AXS) plus a replacement chain pin in the hidden compartment.\u003c\/p\u003e\n\u003ch2\u003eBuilt in Zreče, Slovenia\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. Bikerumor, marking the centenary: \u003cem\u003e\"Unior is one of the rare companies to make their own tools in-house and has been doing so for a hundred years now in the same place in Slovenia.\"\u003c\/em\u003e The Master Chain Tool is one of the products where that vertical integration shows up. The modular insert system is Unior's own design, not a re-badge of a generic chain tool body.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eMost home mechanics underestimate how often a chain wears out. By the time you can hear chain skip on the cassette, the cassette is usually past saving too. Our chain-replacement guide walks through the wear-checker reading that should trigger the swap, the difference between Campagnolo peening and SRAM PowerLock reinstalls, and where the Master Chain Tool's supports earn their keep: When and how to replace your chain →\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhich chains does the Master Chain Tool work with?\u003c\/strong\u003e All derailleur chains from 6 to 13 speed, SRAM AXS flat-top chains with the dedicated black support fitted, and most 1\/8″ singlespeed chains. It also peens Campagnolo 11-, 12-, and 13-speed connecting rivets using the included pin blocker.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I change the floating chain supports?\u003c\/strong\u003e Loosen the preset fixing bolts counter-clockwise and lift the support off the body. Set the replacement in place — an integrated magnet aligns it — then retighten the bolts to roughly 5 Nm. The bolt design resists over-torquing, so the support keeps the float it needs to position the chain.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere is the spare chain pin, and can I buy replacements?\u003c\/strong\u003e A replacement pin ships inside the hidden compartment under the spindle handle; open it with a 3 mm hex key. Spare pins (article 1647.1\/4A) fit both this tool and the Pro Chain Tool 1647\/2ABI, and each of the three chain supports is sold separately as a two-piece spare set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it open or close quick links?\u003c\/strong\u003e No. This tool cuts chains to length, presses connecting pins, and peens Campagnolo rivets. Quick links are a squeeze job, not a press job — our Master Link Pliers 1720\/4DP handle opening and closing them, and the two tools together cover a complete chain swap.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":35720600518809,"sku":"628516","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1647_2bbi-us.png?v=1787170070"},{"product_id":"three-legged-hex-wrench-4mm-x-5mm-x-6mm","title":"Three-Way Wrench - 1781","description":"\u003cp\u003eWhat's quicker than a multitool, has a lightweight and ergonomic handle, and comes in five different varieties? Our three-way wrenches. Offered in a total of 5 different configurations for every purpose you can imagine: three hex versions, one torx, and one 3-way socket wrench.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 3-way socket wrench uses standard 1\/4\" sockets so you can customize it to fit your needs. Check out our 187\/2HX and 187\/2TX hex and Torx bits.\u003c\/li\u003e\n\u003cli\u003eA 3-way Torx includes T10, T15, and T25 wrenches\u003c\/li\u003e\n\u003cli\u003eTwo straight-tip hex options: a 2, 2.5, and 3mm as well as a 4, 5, and 6mm\u003c\/li\u003e\n\u003cli\u003eOne ball-end hex option in 4, 5, and 6mm.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Unior","offers":[{"title":"4, 5, 6mm Straight-tip Hex","offer_id":35720625586329,"sku":"624909","price":8.5,"currency_code":"USD","in_stock":true},{"title":"4, 5, 6mm Ball-tip Hex","offer_id":35720625619097,"sku":"624910","price":9.5,"currency_code":"USD","in_stock":true},{"title":"2, 2.5, 3mm Straight-tip Hex","offer_id":35720625651865,"sku":"624908","price":7.5,"currency_code":"USD","in_stock":true},{"title":"T10, T15, T25 Torx","offer_id":35720625684633,"sku":"624911","price":7.5,"currency_code":"USD","in_stock":true},{"title":"8, 9, 10mm Socket","offer_id":35720625717401,"sku":"625008","price":12.9,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/products\/1781_2-us.jpg?v=1642731319"},{"product_id":"housing-cutters","title":"Cable Housing Cutters - 584\/4BI-US","description":"\u003cp\u003eSharing most of the same design as our old 584\/2POLLY cutters, the new 584\/4BI use higher quality steel and better induction hardening along the cutting edges for longer life. A new style of crimper helps to make sure those cable tips never come off.\u003c\/p\u003e\n\u003cp\u003eThese are designed specifically for cutting housing. To cut inner cables, please look at our \u003ca href=\"\/products\/side-cutter-dike-nippers\"\u003e461\/1 Side Cutters\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHousing only, and why\u003c\/h2\u003e\n\u003cp\u003eThe jaws are developed for cutting brake and shift housing: they cut precisely and smoothly, without deforming the housing, so the cut end stays round and the inner cable still slides freely.\u003c\/p\u003e\n\u003cp\u003eUnior's advisory on the datasheet is plain: to preserve the cutting performance, do not use these pliers on shift or brake inner wires, or on spokes. Those cuts belong to a side cutter.\u003c\/p\u003e\n\u003ch2\u003eCrimper and lock\u003c\/h2\u003e\n\u003cp\u003eThe crimping function is built into the head. Once a cable is trimmed, slide an end cap over the wire and crimp it closed in the same tool, so the strands cannot fray.\u003c\/p\u003e\n\u003cp\u003eA locking mechanism holds the pliers closed for easier storing. To unlock it, squeeze the handles and release: the return spring opens the jaws again.\u003c\/p\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eArticle: 584\/4BI-US, Unior code 628148\u003c\/li\u003e\n\u003cli\u003eLength: 180 mm\u003c\/li\u003e\n\u003cli\u003eWidth: 25 mm\u003c\/li\u003e\n\u003cli\u003eThickness: 18 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 214 g\u003c\/li\u003e\n\u003cli\u003eGrips: red bi-material\u003c\/li\u003e\n\u003cli\u003eEAN: 3838909281483\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče, Slovenia\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 584\/4BI-US is the US-market article of Unior's housing cutter, covered by a lifetime warranty.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eCut the new housing off the bike, matched against the old piece, and cut it a little proud rather than short: you can always take another few millimeters off. Crimp the end cap only after the cable is tensioned and the shifting is set, since the cap has to come off again if you need to re-pull the cable. New housing and a clean cut solve more shifting problems than barrel adjusters do: How to Adjust a Rear Derailleur →\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the 584\/4BI-US cut?\u003c\/strong\u003e Brake and shift housing only. The jaws are developed to cut housing precisely and smoothly, without deforming it, so the cut end stays round. Unior's official advisory is not to cut shift or brake inner wires or spokes with these pliers, to preserve cutting performance. For inner cables, use a side cutter such as the 461\/1VDEBI.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it crimp cable end caps?\u003c\/strong\u003e Yes. A crimping function is built into the pliers for cable end caps: after trimming the inner wire, slide an end cap over the cut strands and crimp it closed so the tip cannot fray or come off.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the locking mechanism work?\u003c\/strong\u003e The lock holds the pliers closed for easier storing. To unlock them, simply squeeze the handles and release: the return spring opens the jaws again.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the dimensions and weight?\u003c\/strong\u003e Official dimensions are 180 mm length, 25 mm width and 18 mm thickness, at 214 g (listed dimensions may vary in tolerance). The US article is 584\/4BI-US, code 628148, EAN 3838909281483, with red bi-material grips and Unior's lifetime warranty.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":35720626602137,"sku":"628148","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/584_4bi-us.jpg?v=1787169949"},{"product_id":"torx-profile-screwdriver-with-t-handle-193tx","title":"T-Handle Torx Driver - 193TX-US","description":"\u003ch2\u003eBuilt for daily shop use\u003c\/h2\u003e\n\u003cp\u003eT-handles are amazing tools. Insert the short end into the bolt for extra leverage, use the long end to quickly spin the fastener. A comfortable, ergonomic handle makes the tool easy to use, and the chrome plated chrome-vanadium shaft with black anodised tips will last for years of service.\u003c\/p\u003e\n\u003ch2\u003eSizes\u003c\/h2\u003e\n\u003cp\u003eThese are available in a range of sizes, Torx and hex.\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat sizes does the 193TX T-handle Torx driver come in?\u003c\/strong\u003e Seven sizes, sold individually: T8, T10, T15, T20, T25, T27 and T30. The blade grows with the size — T10 and T15 run 126 mm overall, T8 and T20 run 151 mm, and T25 through T30 run 184.5 mm — so the larger drivers give you more reach and leverage. The same drivers are also available together as the T-handle TX wrench set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen do I use the long end versus the short end?\u003c\/strong\u003e Use the long blade to spin fasteners in or out quickly — the T-handle lets the shaft twirl between your fingers. For final tightening or breaking a stubborn bolt loose, flip the tool and drive with the short end, using the full crossbar as a lever.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the blade made of?\u003c\/strong\u003e Premium chrome vanadium steel with a chrome-plated finish and a black anodised tip, set in a polypropylene handle. Like all Unior hand tools it is covered by a lifetime warranty.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill a Torx driver damage the fastener head?\u003c\/strong\u003e Not when the size matches the fastener. The Torx profile is cut so force is distributed evenly across the contact surface, away from the outer corners and edges of the recess — that is what the star shape is for. Always seat the correct size fully before turning; a T25 tool in a T27 head is what rounds fasteners out.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"T8","offer_id":35720664154265,"sku":"625711","price":5.19,"currency_code":"USD","in_stock":false},{"title":"T10","offer_id":35720664187033,"sku":"625121","price":5.29,"currency_code":"USD","in_stock":true},{"title":"T15","offer_id":35720664219801,"sku":"625122","price":6.49,"currency_code":"USD","in_stock":true},{"title":"T20","offer_id":35720664252569,"sku":"625712","price":6.49,"currency_code":"USD","in_stock":true},{"title":"T25","offer_id":35720664285337,"sku":"625123","price":6.49,"currency_code":"USD","in_stock":true},{"title":"T27","offer_id":35720664318105,"sku":"628632","price":7.49,"currency_code":"USD","in_stock":true},{"title":"T30","offer_id":35720664350873,"sku":"625124","price":7.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/193tx-us.jpg?v=1787174084"},{"product_id":"aluminum-bottom-bracket-sockets-1671","title":"Aluminum Bottom Bracket Socket - 1671","description":"\u003cp\u003eAll models of our BB sockets are precision CNC machined tools for the installation and removal of various bottom bracket cups. Durable and precise in fitting, they won't damage the BB cups.\u003cbr\u003e\u003cbr\u003eAvailable for the following types of bottom brackets:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e16-notch\u003c\/li\u003e\n\u003cli\u003eShimano BB9000\u003c\/li\u003e\n\u003cli\u003eShimano BBR60\u003c\/li\u003e\n\u003cli\u003eBSA30 (Threaded BB30)\u003c\/li\u003e\n\u003cli\u003eFSA Mega-Evo\u003c\/li\u003e\n\u003cli\u003eT47\u003c\/li\u003e\n\u003cli\u003eE13\u003c\/li\u003e\n\u003cli\u003eHope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMany common bottom brackets and the corresponding tool used to install them can be found in our \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0012\/5786\/5260\/files\/BB_Socket_Compatibility.pdf?v=1650898386\" title=\"Unior bottom bracket tool compatibility chart\" target=\"_blank\"\u003ecompatibility chart\u003c\/a\u003e.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"16-notch","offer_id":35720666742937,"sku":"627623","price":27.5,"currency_code":"USD","in_stock":true},{"title":"BB9000","offer_id":35720666775705,"sku":"627619","price":22.0,"currency_code":"USD","in_stock":true},{"title":"BBR60","offer_id":35720666808473,"sku":"627620","price":22.0,"currency_code":"USD","in_stock":true},{"title":"BSA30","offer_id":35720666841241,"sku":"627621","price":25.5,"currency_code":"USD","in_stock":true},{"title":"Mega Evo","offer_id":35720666874009,"sku":"627622","price":27.5,"currency_code":"USD","in_stock":true},{"title":"T47","offer_id":35720666906777,"sku":"628495","price":38.99,"currency_code":"USD","in_stock":true},{"title":"E13","offer_id":43797513863404,"sku":"629358","price":28.5,"currency_code":"USD","in_stock":true},{"title":"Hope","offer_id":43797515763948,"sku":"629359","price":28.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/products\/1671.t47.jpg?v=1642715756"},{"product_id":"chain-wear-indicator","title":"Manual Chain Wear Indicator - 1644\/2","description":"\u003cp\u003eA go\/no-go gauge gives one answer: it fits, or it doesn't. The Manual Chain Wear Indicator 1644\/2 is the cycling version of that workshop standard. Drop it across two links of a chain, push down, and the chain either holds it or lets it drop. Holds it, the chain is still inside service tolerance. Drops, the chain needs replacing.\u003c\/p\u003e\n\u003cp\u003eThere's no dial, no electronic reading, no calibration to wonder about. The 1644\/2 is a flat piece of laser-cut steel with two reference faces, each cut to a published tolerance. It's the simplest answer to “is this chain done.”\u003c\/p\u003e\n\u003ch2\u003eHow to read it\u003c\/h2\u003e\n\u003cp\u003eTwo zones are stamped on the tool:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0 to 0.6%\u003c\/strong\u003e is the no-wear side. If the gauge sits without dropping in on this end, the chain is still inside its service window.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.7% to 1.2%\u003c\/strong\u003e is the wear side. If the gauge drops in here, the chain is past replacement and the cassette teeth are next in line.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe decision is binary. There's no in-between reading to second-guess.\u003c\/p\u003e\n\u003ch2\u003eWhen this is the right call\u003c\/h2\u003e\n\u003cp\u003eThe 0.7% replacement trigger is the legacy chain-wear convention. It's accurate for \u003cstrong\u003e6- through 10-speed\u003c\/strong\u003e drivetrains, where wider cog spacing gives the chain a little more room before deformation cascades into the cassette.\u003c\/p\u003e\n\u003cp\u003eModern 11-, 12-, and 13-speed chains want a tighter call. Current chain-maker guidance is to swap a narrow-spaced chain at or before 0.5%, and the 1644\/2's drop-over only triggers at 0.7%. On those drivetrains, the \u003ca href=\"\/products\/chain-wear-indicator-1644-6\"\u003eChain Wear Indicator 1644\/6\u003c\/a\u003e reads both 0.5% and 0.75% directly and is the right tool for the speed.\u003c\/p\u003e\n\u003cp\u003eWhere the 1644\/2 still earns its space is on the older bikes, in the home toolkit that needs to be cheap and small enough to live in a drawer, and as the second gauge on a shop bench that's already running a more granular reader.\u003c\/p\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e122.5 × 37 × 2 mm (with a 12.7 mm reference length for pin-to-pin spacing)\u003c\/li\u003e\n\u003cli\u003e40 g\u003c\/li\u003e\n\u003cli\u003ePrecision laser-cut steel\u003c\/li\u003e\n\u003cli\u003eGo\/no-go reading at 0.7% replacement threshold\u003c\/li\u003e\n\u003cli\u003eLifetime warranty\u003c\/li\u003e\n\u003cli\u003eArticle number: 1644\/2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče, Slovenia\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1644\/2 is the entry-level chain-wear tool in the catalog, and the design reflects what the workshop standard quality-assurance gauge has always been: a known reference shape that either fits or doesn't, ground to a tolerance the user can trust. The cheap version of that gauge is a Popsicle stick with two notches scratched into it. This one is laser-cut steel.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eA go\/no-go reading doesn't tell you when the chain crossed the line, only that it has. Our chain-replacement guide explains what's happening on the cassette teeth between the two readings the 1644\/2 won't separate, why the 0.5% versus 0.75% distinction matters once you know which drivetrain you're on, and how to plan a new chain in before the cassette pays for the delay: When and how to replace your chain →\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat counts as excessive wear on a bike chain?\u003c\/strong\u003e Elongation past the replacement threshold. On the 1644\/2's wear side, marked 0.7% to 1.2%, a chain that lets the gauge drop in is overdue for replacement; the cassette teeth take the damage next.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich drivetrains suit the 1644\/2's 0.7% replacement threshold?\u003c\/strong\u003e The 0.7% trigger is the legacy convention and stays right for 6- through 10-speed drivetrains, whose wider cog spacing tolerates more elongation before the cassette suffers. Chains for 11-speed and up, 12- and 13-speed included, should be swapped at or before 0.5%, a reading the Chain Wear Indicator 1644\/6 makes directly on its body.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the Manual Chain Wear Indicator need calibrating?\u003c\/strong\u003e No. It's a flat gauge in laser-cut steel whose two reference faces are cut to published tolerances; there's no dial or electronic reading to drift, and the tool carries a lifetime warranty.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":35720735424665,"sku":"617171","price":6.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1644_4.jpg?v=1787169381"},{"product_id":"bottom-bracket-wrench-open","title":"Open 16 Notch External Bottom Bracket Wrench - 1609\/2HOBBY-US","description":"\u003cp\u003eThe 1609\/2HOBBY-US is the home-mechanic version of our \u003ca href=\"\/products\/16-notch-bottom-bracket-wrench\"\u003e1609\/2BI-US 16 Notch BB Wrench\u003c\/a\u003e. The pattern is the same; the engagement is the same; the difference is an open-cup design rather than a closed cup, and a price point that fits a home toolkit rather than a workshop wall.\u003c\/p\u003e\n\u003cp\u003eFor most home BB jobs, the open pattern is what the work calls for. The closed-cup 1609\/2BI-US matters on benches that see hundreds of BB services a year, where the additional cup material adds a margin against tool wear. On the home bench that sees a BB service once a season, the open version delivers the same job for less.\u003c\/p\u003e\n\u003ch2\u003eHow it's used\u003c\/h2\u003e\n\u003cp\u003eMount the wrench so all 16 notches mesh with the BB cup's outer face. Press home before applying torque. Drive side is reverse threaded on Shimano-pattern external BBs (loosens clockwise); non-drive side is normally threaded.\u003c\/p\u003e\n\u003cp\u003eApply force slowly. The most common home-mechanic mistake on a BB removal is jerking torque on a cup that hasn't been fully seated by the wrench. The cup notches round, the wrench splines round, and the next BB service requires both a new cup and a new wrench.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eShimano Hollowtech II external bottom brackets\u003c\/li\u003e\n\u003cli\u003eSRAM and Truvativ external bottom brackets\u003c\/li\u003e\n\u003cli\u003eCampagnolo Ultra-Torque and Power Torque, Race Face, FSA, and Chris King 16-notch external bottom brackets\u003c\/li\u003e\n\u003cli\u003eThis open 1609\/2HOBBY-US is not the closed-ring 1609\/2BI-US workshop wrench; that article has a double-component handle and includes a crank-cap tool\u003c\/li\u003e\n\u003cli\u003eAlso fits the external Centerlock disc nut and other disc-brake rotor lockrings with 16 external notches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e premium flex plus carbon steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e trivalent chrome plated according to ISO 1456:2009\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle length:\u003c\/strong\u003e 310 mm. Thickness (A): 3 mm. Radius (R): 1.5 mm. Weight: 270 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotch pattern:\u003c\/strong\u003e 16-notch external, open-jaw design. Jaw diameters D1 21.35 mm and D2 22.5 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1609\/2HOBBY-US is the same precision-machined notch pattern as the workshop 1609\/2BI-US; the price difference comes from the open-cup geometry, not from cutting tolerances on the splines.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eIf the BB cup won't release with steady pressure, the issue is almost always corrosion at the cup-to-shell interface, not torque. Apply a penetrating fluid at the thread interface, wait fifteen minutes, then try again. A cup that's been seized in place for years often releases on the second try after a soak; one that won't release on the first try usually responds to patience rather than to an impact pull.\u003c\/p\u003e\n\u003cp\u003eFor the home-mechanic BB service walkthrough including the order of operations and the torque specs for reinstall: Replace or clean your bottom bracket →.\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat cups does the 1609\/2HOBBY-US fit?\u003c\/strong\u003e Unior names Shimano Hollowtech II, Campagnolo Ultra-Torque and Power Torque, Race Face, FSA, SRAM, Truvativ and Chris King, plus other 16-notch external cups. It is not an 8-notch, BSA30, T47 or press-fit tool.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is this different from the 1609\/2BI-US?\u003c\/strong\u003e This article is the open HOBBY wrench: 310 mm long, 270 g, no included crank-cap tool, listed in Home kit 2.0. The 1609\/2BI-US is a closed ring (350 mm, 333 g) with a double-component handle and an included wrench for Shimano plastic crank bolts. Do not mix the two spec tables.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it turn a Centerlock rotor lockring?\u003c\/strong\u003e Yes, when the lockring is the external 16-notch pattern. Unior says the 1609\/2HOBBY also fits the external Centerlock disc nut and other disc-brake rotor nuts with 16 external notches. Unior does not publish a 15 mm or 20 mm thru-axle limit for this wrench.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the official dimensions?\u003c\/strong\u003e Code 624935. Jaw diameters D1 21.35 mm and D2 22.5 mm, length 310 mm, thickness 3 mm, radius 1.5 mm, weight 270 g. Material is premium flex plus carbon steel; the finish is trivalent chrome plated to ISO 1456:2009. Dimensions are in millimetres and may vary in tolerance.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":35720743649433,"sku":"624935","price":8.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1609_2hobby-us.jpg?v=1787169295"},{"product_id":"16-notch-bottom-bracket-wrench","title":"16 Notch External Bottom Bracket Wrench - 1609\/2BI-US","description":"\u003cp\u003eThe 1609\/2BI-US is called a bottom bracket wrench, but on most workshop benches it earns its hook for three jobs, not one. Multi-tasking is good.\u003c\/p\u003e\n\u003cp\u003eFirst job: install and remove 16-notch external bottom brackets. That's the dominant pattern across Shimano (Hollowtech II), SRAM (GXP and DUB), Campagnolo, FSA, Chris King, Race Face Cinch, and most other current external-bearing BBs. The cup is machined to close tolerances so the splines mesh fully with the BB's outer notches without marring the BB's finish, and the offset handle is distanced just far enough so your knuckles clear the frame but not so far as to create unnecessary cam-out, causing the tool to slip.\u003c\/p\u003e\n\u003cp\u003eSecond job: external Centerlock disc-rotor lockrings. The same 16-notch interface that secures HT2 BB cups is what Shimano uses for the larger Centerlock lockring on 15 mm and 20 mm thru-axle hubs. One wrench, two services.\u003c\/p\u003e\n\u003cp\u003eThird job: a small wrench machined into the 1609\/2BI-US's body for the preload caps on Shimano Hollowtech II cranksets. It's the cap that sets the bearing preload after the crank is reinstalled; an everyday turn that needs an everyday tool, kept on the same body as the BB wrench so it doesn't get lost. A strong magnet on the back face keeps the small wrench attached when not in use.\u003c\/p\u003e\n\u003ch2\u003eHow it's used\u003c\/h2\u003e\n\u003cp\u003eFor BB cups: mount the wrench's notched cup over the BB's outer face so all 16 notches mesh fully. Drive side is reverse threaded on Shimano-pattern BBs (loosens clockwise); non-drive side is normally threaded. Apply force slowly; jerking torque cams the wrench out.\u003c\/p\u003e\n\u003cp\u003eFor Centerlock lockrings on thru-axle hubs: same notched interface, same wrench, smaller load.\u003c\/p\u003e\n\u003cp\u003eFor Shimano HT2 preload caps: detach the small wrench from the magnetic back face and hand-turn the cap to set bearing preload (finger-tight plus a quarter turn, about 0.5–0.7 Nm).\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eShimano Hollowtech II road and MTB\u003c\/li\u003e\n\u003cli\u003eSRAM GXP and DUB external BBs\u003c\/li\u003e\n\u003cli\u003eCampagnolo road, FSA Mega Exo, Chris King, Race Face Cinch, and other 16-notch external BBs\u003c\/li\u003e\n\u003cli\u003eExternal Centerlock disc-rotor lockrings (15 mm and 20 mm thru-axle hubs)\u003c\/li\u003e\n\u003cli\u003eShimano HT2 preload caps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e premium flex plus carbon steel, hardened and tempered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e chrome-plated to ISO 1456:2009\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle length:\u003c\/strong\u003e ~250 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotch pattern:\u003c\/strong\u003e 16-notch external (Shimano \/ SRAM \/ FSA \/ Campagnolo standard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e integrated preload-cap wrench held to the body with a strong magnet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1609\/2BI-US's offset handle geometry is the design call that separates a workshop wrench from a value-tier tool; the offset clears modern frames' chainstays and BB shells while keeping the handle close enough to the cup to load the wrench cleanly without cam-out.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eThe most common BB-wrench failure mode isn't tool wear; it's incomplete engagement on the cup. Press the wrench fully home before applying torque. If the splines are sitting partially proud of the BB's notches, the first hard turn will skip and round both the cup notches and the wrench splines. Two seconds of careful seating saves a marred BB cup and a sharp scratch on someone's frame.\u003c\/p\u003e\n\u003cp\u003eFor the full BB removal procedure including thread direction by side and reinstall torque: Replace or clean your bottom bracket →.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":35720746434713,"sku":"624903","price":27.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1609_2bi-us.jpg?v=1787168556"},{"product_id":"cartridge-bottom-bracket-tool","title":"20 Tooth Cartridge Bottom Bracket Tool - 1671.1\/4","description":"\u003cp\u003eInternal cartridge cups hide a 20-spline recess. Unior's 1671.1\/4 is the socket that matches that recess on the Shimano and ISIS cartridge units the official listing names.\u003c\/p\u003e\n\u003cp\u003eSeat every spline before you turn. Unior's service manual drives this tool with a 1\/2\" ratchet and tells you to hold it steady so it cannot slip and damage the cup. The official pairing is ratchet 190.1ABI. The profile badge on the official page is \"do not use with pneumatic, electric or cordless tools.\"\u003c\/p\u003e\n\u003cp\u003eWork starts on the left cup. On the English-thread shells in Unior's square-cartridge and Octalink procedures, the right cup loosens clockwise.\u003c\/p\u003e\n\u003cp\u003eWhen a seized square-cartridge cup needs more leverage than a ratchet gives, the service manual switches to the handled \u003ca href=\"\/products\/cartridge-bottom-bracket-wrench\"\u003eCartridge Bottom Bracket Wrench (1671.8\/2BI-US)\u003c\/a\u003e. That wrench uses a 350 mm handle and a double-threaded screw that locates in the axle so the head cannot walk out.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eShimano and ISIS cartridge bottom brackets (official 1671.1\/4 listing)\u003c\/li\u003e\n\u003cli\u003e20-spline cartridge cups, including the Octalink or ISIS units in Unior's service manual\u003c\/li\u003e\n\u003cli\u003eSquare-cartridge (square-spindle) cups. The same manual uses 1671.1\/4 on that interface\u003c\/li\u003e\n\u003cli\u003eNot Hollowtech II or other external 16-notch cups. Those take 1671.5\/2BI\u003c\/li\u003e\n\u003cli\u003eNot the 8-notch 1671.2\/4 (outside-notch Octalink cups and Bosch Generation 3 and 4 lockrings)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eArticle 1671.1\/4, code 616068\u003c\/li\u003e\n\u003cli\u003e20-tooth spline\u003c\/li\u003e\n\u003cli\u003eMaterial: premium flex plus carbon steel\u003c\/li\u003e\n\u003cli\u003eDrive: 1\/2\" square; official pairing is ratchet 190.1ABI\u003c\/li\u003e\n\u003cli\u003eWeight: 112 g\u003c\/li\u003e\n\u003cli\u003eLifetime warranty\u003c\/li\u003e\n\u003cli\u003eDo not use with pneumatic, electric, or cordless tools\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll listed dimensions are in millimetres and may vary in tolerance. Weight is in grams.\u003c\/p\u003e\n\u003ch2\u003eBuilt in Zreče, Slovenia\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1671.1\/4 is the small socket that still turns the cartridge cups on bikes that never moved to an outboard bearing.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eThe usual failure is the socket walking out of the spline under load. Keep it pressed in, or use the 1671.8\/2BI-US wrench whose screw locates in the axle. Cranks come off first; that procedure is in How to remove a crankset →.\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the 20-tooth 1671.1\/4 fit?\u003c\/strong\u003e Unior lists it for Shimano and ISIS cartridge bottom brackets. The service manual uses it on 20-spline cartridge cups, including Octalink or ISIS units and square-cartridge (square-spindle) cups. Count the splines in the cup before you buy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat will this socket not turn?\u003c\/strong\u003e It is not a Hollowtech II or external 16-notch cup wrench; those take 1671.5\/2BI. It is not the 8-notch 1671.2\/4, which Unior lists for Octalink cups with outside notches and for Bosch Generation 3 and 4 chainring lockrings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat drive size does the 1671.1\/4 take?\u003c\/strong\u003e Official copy says to use it with Unior's 1\/2 inch ratchet 190.1ABI. The service manual drives it with a 1\/2 ratchet and tells you to stabilize the socket so it cannot slip. The official page also says not to use pneumatic, electric, or cordless tools.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is 1671.1\/4 different from 1671.2\/4?\u003c\/strong\u003e 1671.1\/4 is the 20-tooth socket (code 616068, 112 g) for Shimano and ISIS cartridge cups. 1671.2\/4 is the 8-notch tool (code 616069, 211 g) for outside-notch Octalink cups and Bosch Gen 3 and 4 lockrings. Same 1671 family, different tooth count and job.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":35720753086617,"sku":"616068","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1671.1_4.jpg?v=1787169349"},{"product_id":"bsa30-bottom-bracket-wrench-2620-2bi-us","title":"BSA30 Bottom Bracket Wrench - 2620\/2BI-US","description":"\u003cp\u003eBSA30 is the threaded BB shell that hosts a 30 mm spindle: standard 1.37\" × 24 TPI BSA threading on the shell side, but cups bored for 30 mm rather than the conventional 24 mm. Race Face Cinch BSA30 cups use a 16-notch outer engagement at the BSA30 OD; that's the cup geometry the 2620\/2BI-US is cut to fit. The cup OD is wider than a standard 24 mm HT2 cup, which means a standard 16-notch HT2 wrench will rock on the engagement and round the notches under install torque.\u003c\/p\u003e\n\u003cp\u003eThe 2620\/2BI-US is the wrench cut specifically for the 16-notch BSA30 cup. The notch profile sizes to the BSA30 outer engagement; the bi-material handle gives a clean hand-grip for off-bench prep, and the laser-cut 1\/2\" square drive at the head accepts a torque wrench when the cup is ready to be torqued to its install spec.\u003c\/p\u003e\n\u003ch2\u003eSocket vs. wrench: which to reach for\u003c\/h2\u003e\n\u003cp\u003eThe catalog offers two options for 16-notch BSA30 cups: this wrench (2620\/2BI-US, fixed handle + 1\/2\" square drive) and the \u003ca href=\"\/products\/aluminum-bottom-bracket-socket-bsa30-threaded-bb30\"\u003eAluminum BB Socket BSA30\u003c\/a\u003e (socket-only, 1\/2\" square drive). The choice is workflow-driven: the wrench is the everyday tool when the cup is on the bike and the handle's leverage gets the cup started or backed off without a separate ratchet; the socket is the right tool when a torque wrench is already in hand for the final install torque.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e16-notch BSA30 cups (Race Face Cinch and other 16-notch BSA30 patterns)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for\u003c\/strong\u003e Praxis M30 (Praxis cups use a 12-notch ~46.3 mm OD pattern; use the \u003ca href=\"\/products\/bottom-bracket-wrench-12-notch-1671-9-2dp\"\u003e12-Notch BB Wrench 1671.9\/2DP\u003c\/a\u003e for those)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for\u003c\/strong\u003e PF30 \/ PF30A press-fit shells; those need a press-fit bearing remover\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for\u003c\/strong\u003e standard 24 mm-spindle HT2 cups; use the \u003ca href=\"\/products\/16-notch-bottom-bracket-wrench\"\u003e16 Notch BB Wrench 1609\/2BI-US\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e premium flex plus carbon steel, hardened and tempered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle:\u003c\/strong\u003e bi-material grip (comfort + slip-resistance)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e 1\/2\" square drive at the head for torque-wrench attachment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotch fit:\u003c\/strong\u003e BSA30 outer profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e the wrench itself\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 2620\/2BI-US is the dedicated wrench for the 16-notch BSA30 cup geometry; shops working on Race Face Cinch-equipped frames pull this wrench off the bench far more often than a Shimano-pattern HT2 wrench would seat on the same cup.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eBSA30 keeps BSA's per-side thread handedness: drive-side reverse-threaded (loosens clockwise), non-drive normally threaded. Same rule as a standard BSA HT2 install. The wider cup OD doesn't change the thread direction. The mistake to watch for is over-torquing: 30 mm-spindle BSA cups don't have a universal published torque value, and the band varies by crankset manufacturer. Verify the specific crankset's published install torque before applying final force; Shimano's 35–50 Nm HT2 spec is the wrong reference here.\u003c\/p\u003e\n\u003cp\u003eFor the BB install \/ remove procedure: Replace or clean your bottom bracket →.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":43029457207532,"sku":"628596","price":15.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/BSA30-Bottom-Bracket-Wrench.jpg?v=1787169311"},{"product_id":"bottom-bracket-wrench-12-notch-1671-9-2dp","title":"Bottom Bracket Wrench 12 notch - 1671.9\/2DP","description":"\u003cp\u003ePraxis Works M30 external bottom brackets use a 12-notch interface that doesn't match the 16-notch Shimano-pattern wrenches that cover most of the current market. The notch diameter sits at approximately 46.3 mm. A 16-notch wrench skates across the cup; a 12-notch tool sized to the wrong diameter rounds the notches on the first hard turn. The 1671.9\/2DP is the dedicated wrench for this specific interface.\u003c\/p\u003e\n\u003ch2\u003eHow it's used\u003c\/h2\u003e\n\u003cp\u003eMount the wrench's notched face over the BB cup so all 12 notches mesh fully with the cup's pattern. Press the wrench home before applying torque; partial engagement is what rounds notches on press-fit-threaded crossover designs like the M30.\u003c\/p\u003e\n\u003cp\u003eThe wrench body has a 1\/2″ square drive on the working face for driving with a torque wrench or a 1\/2″ ratchet. That matters on M30 cups: Praxis specifies an install torque, and a torque wrench is what hits it cleanly.\u003c\/p\u003e\n\u003cp\u003eDrive side on most M30 cups is right-hand thread (loosens counter-clockwise); non-drive side is normally threaded. Verify against the BB's marking before applying force; some M30 generations differ from the standard.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePraxis Works M30 external bottom brackets\u003c\/li\u003e\n\u003cli\u003eOther external BBs with a 12-notch pattern at approximately 46.3 mm diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot compatible\u003c\/strong\u003e with 16-notch external BBs (Shimano Hollowtech II, SRAM GXP \/ DUB); for those, use the \u003ca href=\"\/products\/16-notch-bottom-bracket-wrench\"\u003e16 Notch External Bottom Bracket Wrench (1609\/2BI-US)\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e premium flex plus carbon steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e chrome-plated to ISO 1456:2009\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotch pattern:\u003c\/strong\u003e 12-notch, sized for ~46.3 mm OD cups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive interface:\u003c\/strong\u003e 1\/2″ square on the working face for torque wrench or 1\/2″ ratchet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1671.9\/2DP exists because the modern BB market hasn't converged on a single notch standard; threaded crossovers like Praxis M30 are common enough that a dedicated 12-notch wrench earns its place on the wall, not just a generic spline tool.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003ePraxis M30 cups can creak under load when the cup-to-shell interface dries out. Before reinstalling, clean the threads thoroughly and apply a thin film of grease or anti-seize. A dry interface is the most common cause of M30 BB creaks, and the fix is exactly the workshop step that takes thirty seconds at install time and ninety minutes if it's missed.\u003c\/p\u003e\n\u003cp\u003eFor the full BB removal-and-reinstall procedure including thread cleaning and grease application: Replace or clean your bottom bracket →.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":43889704796396,"sku":"629501","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/Bottom-Bracket-Wrench-12-notch.jpg?v=1787169284"},{"product_id":"master-link-pliers-1720-4dp","title":"Master Link Pliers - 1720\/4DP","description":"\u003cp\u003eModern derailleur chains reinstall on a master link more often than they reinstall on a pressed pin. Most 11- and 12-speed chains ship with one or two; SRAM flat-top AXS chains use a flat-top variant, KMC and Shimano publish their own quick-link patterns. Putting them in by hand works on a clean bench, but the snap into place is easier and more reliable with a tool designed for the job. The Master Link Pliers 1720\/4DP do that in one squeeze, and they take a master link back out the same way.\u003c\/p\u003e\n\u003cp\u003eThe dual-function jaws are what separate this from an open-only or close-only plier. One pair of pliers handles installation and removal; you don't carry two tools, and you don't fight a closed master link with thin-nose pliers when you need to break a chain to clean it. The body is laser-cut steel, heat-treated for grip on the master-link plates, and the handle is double-dipped for hand comfort during repeated use.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe 1720\/4DP works with \u003cstrong\u003emost 6- through 13-speed derailleur chain master links\u003c\/strong\u003e, including the flat-top master links on SRAM AXS chains. The geometry is designed around the master-link plates that current chain manufacturers publish; chain widths within that speed range share enough plate geometry for one tool to cover them.\u003c\/p\u003e\n\u003cp\u003eThere are master links the 1720\/4DP won't open. Proprietary or one-time-use links that are designed not to come back out (some 12-speed PowerLocks) will resist the plier, and the design intent of the chain is to replace rather than reuse them. For those, the right move is a new master link, not a harder squeeze on the tool. If you also need to break the chain at a non-master-link point (for cleaning, or to size a fresh chain), the \u003ca href=\"\/products\/chain-breaking-pliers\"\u003eChain Breaking Pliers 1640\/1DP\u003c\/a\u003e handle that single-stroke; the 1720\/4DP and the 1640\/1DP cover the two halves of the chain-service workflow.\u003c\/p\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMost 6-13 speed derailleur chain master links, including SRAM flat top\u003c\/li\u003e\n\u003cli\u003e160 × 56 × 21 mm\u003c\/li\u003e\n\u003cli\u003e74 g\u003c\/li\u003e\n\u003cli\u003eDual-function jaws: opens and closes master links\u003c\/li\u003e\n\u003cli\u003eLaser cut and heat treated\u003c\/li\u003e\n\u003cli\u003eMaterial: premium flex plus carbon steel\u003c\/li\u003e\n\u003cli\u003eSurface finish: trivalent chrome plated to ISO 1456:2009\u003c\/li\u003e\n\u003cli\u003eDouble-dipped handles\u003c\/li\u003e\n\u003cli\u003eArticle number: 1720\/4DP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče, Slovenia\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1720\/4DP is small enough to live in a workshop apron or a saddlebag, and substantial enough that you can feel the master link engage when it clicks home. The combination of laser-cut precision and chrome plating to ISO 1456:2009 is the workshop standard; the same finish that survives years of bench grease and brake fluid.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eThe plier itself is the simple part. Knowing which master link to use is the harder one. Reusing a 12-speed PowerLock is a common home-mechanic call that goes wrong; the link is engineered for a single install, the second cycle introduces play that the chain doesn't recover from. Our chain-replacement guide details which master links each manufacturer publishes as reusable, which are one-and-done, and the routing details that prevent a master link from coming out at the worst possible moment: When and how to replace your chain →\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDo the 1720\/4DP pliers both open and close master links?\u003c\/strong\u003e Yes. The dual-function jaws handle both directions: one squeeze snaps a master link closed during installation, and the same tool opens a closed link when you need the chain off for cleaning or replacement. You don't need a separate open-only and close-only plier.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich chains and master links are these pliers compatible with?\u003c\/strong\u003e They work on most 6- to 13-speed derailleur chain master links, including the flat-top master links on SRAM AXS chains. That range covers the quick links shipped with current Shimano, SRAM, and KMC derailleur chains.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I reopen a SRAM 12-speed PowerLock with these pliers?\u003c\/strong\u003e Some 12-speed PowerLocks are designed as one-time-use: SRAM intends them to be replaced, not reopened, and forcing one is not a tool problem the pliers can solve. For those links the correct service move is fitting a new master link rather than reusing the old one.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow big are the Master Link Pliers, and will they fit a travel tool kit?\u003c\/strong\u003e The pliers are 160 mm long, 56 mm wide, 21 mm thick, and weigh 74 grams, so they pack easily into a saddlebag or travel kit. The body is laser-cut, heat-treated carbon steel with a trivalent chrome-plated finish (ISO 1456:2009) and double-dipped handles.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":43889724129516,"sku":"629366","price":13.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/Master-Link-Pliers-Square.jpg?v=1787170087"},{"product_id":"chain-wear-indicator-1644-6","title":"Chain Wear Indicator - 1644\/6","description":"\u003cp\u003eA chain doesn't tell you it's worn. It elongates a few thousandths of a millimeter at every pin, and by the time the cassette starts skipping under load the damage is already done. The Chain Wear Indicator 1644\/6 is the small tool that catches the moment before that happens. Drop it into the chain, push down gently, and the gauge gives you a yes-or-no answer in about three seconds.\u003c\/p\u003e\n\u003cp\u003eThe reason this one reads the chain honestly is the three-point geometry. Most wear gauges register pin-to-pin distance and call it elongation, but a chain with worn-out rollers and tight pins reads false-positive on a two-point tool: the rollers sit loose against the gauge, and the gauge drops in. The 1644\/6 uses a three-point design that isolates pin elongation from roller wear, so the reading reflects the actual chain-stretch number rather than the sloppier proxy.\u003c\/p\u003e\n\u003ch2\u003eHow to read it\u003c\/h2\u003e\n\u003cp\u003eTwo thresholds are stamped on the tool, one at each end:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.5% side\u003c\/strong\u003e for \u003cstrong\u003e11-, 12-, and 13-speed\u003c\/strong\u003e chains. Modern narrow-spaced chains start damaging the cassette before they hit 0.75%, so the replacement trigger moves earlier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.75% side\u003c\/strong\u003e for \u003cstrong\u003e6- through 10-speed\u003c\/strong\u003e chains. The wider cog spacing gives the chain a little more room before the deformation cascade starts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf the 0.5% side drops in on an 11-speed chain, the chain goes. If the 0.75% side drops in on a 9-speed chain, same call. If neither drops in, the chain is still inside its service window. A QR code on the body links to a usage video for the moments when the answer feels closer than that.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eEvery 6- to 13-speed derailleur chain in current production, including SRAM AXS flat-top chains. The three-point design is geometry-agnostic; what differs across speeds is the threshold to read against, not the way the tool sits in the chain.\u003c\/p\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e6-13 speed derailleur chains; SRAM flat-top\u003c\/li\u003e\n\u003cli\u003ePrecision laser-cut steel\u003c\/li\u003e\n\u003cli\u003e178 × 45 × 29.4 mm\u003c\/li\u003e\n\u003cli\u003e20 g\u003c\/li\u003e\n\u003cli\u003eArticle number: 1644\/6\u003c\/li\u003e\n\u003cli\u003eQR code with video usage instructions printed on the body\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče, Slovenia\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The dual-threshold pair stamped on the 1644\/6 matches what current chain manufacturers publish for narrow-spaced and legacy drivetrains; the three-point geometry is the design call that makes the tool useful at both ends. It's a small piece of laser-cut steel that does one job, and it does it more accurately than the gauge in the bottom of your toolbox.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eThe 0.5% vs. 0.75% split is where most home mechanics get the call wrong; the older single-threshold gauges are calibrated to swap a chain \u003cem\u003elater\u003c\/em\u003e than a modern 11- or 12-speed drivetrain wants. The 1644\/6 reads the right threshold for the right chain, but knowing which threshold applies to which bike is the part that's not on the tool. Our chain-replacement guide covers when each threshold applies, what's happening to the cassette teeth in the gap between them, and how to break and reinstall cleanly once the call is made: When and how to replace your chain →\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAt what wear point should a SRAM 12-speed chain be replaced?\u003c\/strong\u003e Like all 11-, 12-, and 13-speed chains, SRAM 12-speed chains (flat-top included) are read against the 1644\/6's 0.5% end; the moment that side drops into the chain, the chain is due. The 0.75% end is for 6- to 10-speed drivetrains only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does the 1644\/6 carry both a 0.5% and a 0.75% threshold?\u003c\/strong\u003e Each end matches a drivetrain generation. Narrow-spaced 11- to 13-speed chains begin damaging the cassette before 0.75%, so their replacement trigger moves up to 0.5%, while 6- to 10-speed chains get enough room from their wider cog spacing to run to 0.75%.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does a three-point chain checker measure that a two-point gauge misses?\u003c\/strong\u003e The difference is what the gauge touches. Resting on two points, a checker can be fooled by loose rollers into condemning a chain whose pins are still tight; the third contact point takes the rollers out of the reading, so what's left is genuine elongation at the pins.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Default Title","offer_id":43889733665004,"sku":"629344","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/Chain-wear-indicator-Square.jpg?v=1787169453"},{"product_id":"bottom-bracket-wrench-12-notch-48mm","title":"Bottom Bracket Wrench 12 Notch - 48mm","description":"\u003cp\u003eElvedes BB cups (and a handful of other 47.8 mm OD 12-notch external BBs) sit between the dominant 16-notch Shimano-pattern interface and the smaller 12-notch Praxis M30 (~46.3 mm). The 48 mm 12-notch isn't a Shimano-compatible size, isn't a Praxis-compatible size, and skates across both other-tool patterns. This is the dedicated wrench for the 47.8 mm 12-notch interface.\u003c\/p\u003e\n\u003cp\u003eMeasure the BB cup OD with calipers across the outer notch face. If the reading is 47.8 mm and the cup shows 12 notches around the perimeter, this is the wrench.\u003c\/p\u003e\n\u003ch2\u003eHow it's used\u003c\/h2\u003e\n\u003cp\u003eMount the wrench over the BB cup so all 12 notches mesh fully. Press home before applying torque; partial seating skips and rounds. The 1\/2″ square drive on the body fits a torque wrench or ratchet for the install step where matching the manufacturer's torque spec matters.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eElvedes external BBs with 12-notch pattern at 47.8 mm OD\u003c\/li\u003e\n\u003cli\u003eOther 12-notch external BBs in the same OD range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot compatible\u003c\/strong\u003e with Praxis M30 (46.3 mm OD) or Shimano-pattern 16-notch BBs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e premium flex plus carbon steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e chrome-plated to ISO 1456:2009\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotch pattern:\u003c\/strong\u003e 12-notch, sized for ~47.8 mm OD cups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive interface:\u003c\/strong\u003e 1\/2″ square on the body for torque wrench or 1\/2″ ratchet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 12-notch 48 mm wrench is one of those tools that's only useful when a specific cup interface lands on the bench, but when it does there's no improvising; only the right notch pattern at the right diameter releases the cup cleanly.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eBefore reaching for any 12-notch wrench, measure the cup OD with calipers across the notch face. The difference between the 46.3 mm Praxis interface and the 47.8 mm Elvedes interface is small but real, and the wrong tool will skate. Two seconds of measurement saves a rounded cup.\u003c\/p\u003e\n\u003cp\u003eFor the full BB removal procedure including pre-removal cleaning and post-removal cup inspection: Replace or clean your bottom bracket →.\u003c\/p\u003e","brand":"Unior USA B2B","offers":[{"title":"Default Title","offer_id":46028835291372,"sku":"629620","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/BottomBracketWrench12Notch.jpg?v=1787169289"},{"product_id":"y-hex-torx-wrench-4x5xtx25","title":"Y Hex \u0026 Torx wrench 4x5xTX25","description":"\u003cp\u003eA Y-handle wrench carries three bit tips in one tool. For cycling, the canonical combination is 4 mm hex, 5 mm hex, and T25 Torx; the three sizes that handle the most common trail-side and shop adjustments. Stem bolts, seatpost binders, derailleur cable-pinch bolts, rotor bolts: this set of three sizes is the small kit that fits the highest fraction of bike fasteners.\u003c\/p\u003e\n\u003cp\u003eThe Y-shape is the form factor that earns this tool its space. Compact, light, and easy to grab; the tool that rides in a saddlebag or sits at the front of the bench-drawer where it gets reached for daily.\u003c\/p\u003e\n\u003ch2\u003eWhat's on the three arms\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 mm hex\u003c\/strong\u003e; stem bolts, brake-caliper mount bolts, some derailleur clamp bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 mm hex\u003c\/strong\u003e; seatpost binders, larger stem bolts, crank pinch bolts, brake-lever clamps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT25 Torx\u003c\/strong\u003e; disc rotor bolts (most common cycling Torx size)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach tip is insert-molded into the composite body with a black-oxide finish. The Y-shape gives you three tools' worth of coverage in one grab.\u003c\/p\u003e\n\u003ch2\u003eWhen the Y-handle earns its space\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrail-side bag.\u003c\/strong\u003e Light enough to ride, sized for the three most-cycled fastener types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApron pocket.\u003c\/strong\u003e When you spend a day doing stem-bolt and rotor-bolt adjustments across multiple bikes, the Y-handle replaces three L-wrenches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTravel mechanic kit.\u003c\/strong\u003e Three sizes in one tool means one tool, not three, in the bag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial-cycle work on a build.\u003c\/strong\u003e Run the obvious bolts to seat-tight with the Y-handle; switch to a torque wrench for final torque.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhen to choose an L-wrench instead\u003c\/h2\u003e\n\u003cp\u003eThe Y-handle is short-arm by design; that's what makes it compact. Long-arm L-wrenches give more leverage on stuck fasteners and more reach into tight spaces. For workshop-only use where the Y-shape doesn't earn its space, the \u003ca href=\"\/products\/set-of-hex-wrenches-long-on-plastic-clip-1-5-10mm-9-pieces\"\u003e9-piece long hex wrench set\u003c\/a\u003e and \u003ca href=\"\/products\/set-of-torx-wrenches-on-plastic-clip-t9-t40-8-piece\"\u003e8-piece Torx set\u003c\/a\u003e cover all sizes in L-form.\u003c\/p\u003e\n\u003cp\u003eThe Y-handle complements those sets; it doesn't replace them.\u003c\/p\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBit sizes: 4 mm hex, 5 mm hex, T25 Torx\u003c\/li\u003e\n\u003cli\u003eBody: composite, ergonomically shaped\u003c\/li\u003e\n\u003cli\u003eTips: insert-molded with black-oxide finish\u003c\/li\u003e\n\u003cli\u003eForm: Y-shape (three radial arms)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMade in Slovenia, since 1919\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The Y-handle is a recent addition to the line, designed for the way modern bike-shop work flows: a small number of fastener sizes account for most of the work, and a tool that handles those three sizes in one form factor saves drawer space and grab-time. The black-oxide tip finish matches the rest of the Torx and hex line.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eKeep one of these in the apron pocket and one in the bag. For the broader framework on hex and Torx wrench types: Hex and Torx wrenches for bike work →.\u003c\/p\u003e","brand":"Unior USA B2B","offers":[{"title":"Default Title","offer_id":47424446660844,"sku":"629583","price":9.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1781_2hxtx_629583_image_1024.jpg?v=1787174342"}],"url":"https:\/\/b2b.uniorusa.com\/collections\/dealer-weeks-drivetrain-days.oembed","provider":"Unior USA B2B","version":"1.0","type":"link"}