Reference
Compatibility and sizing references for bike parts — freehub bodies, bottom brackets, axles and more. Each page is a straight-answer chart you can check before you buy.
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Thru-Axle and Quick Release Sizing: Which Axle Fits Your Bike?
An axle needs three numbers: diameter, hub width and thread pitch. Full tables for front and rear standards from QR through 12x142 and Boost, why two 12x142 frames can need different axles,...
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Bottom Bracket Standards: Which Bottom Bracket Fits Your Frame?
Which bottom bracket fits your frame? You need two things: the shell standard and your crank's spindle. Full tables for BSA, Italian, T47, BB86, BB30, PF30, BB386EVO and BBRight, matched against Shimano...
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Freehub and Cassette Compatibility: Which Cassette Fits Your Wheel?
Which cassettes fit your wheel? Full compatibility tables for Shimano HG, 11-speed road, Micro Spline, SRAM XD and XDR, and Campagnolo — how to identify what you have, when you need a...