Box Five square taper crankset

Featuring the JIS (Japanese Industrial Standard) tapered square standard, the oversized bottom bracket interface features a stepped shape specific to the length of the crank arm meeting at the pedal. Unlike other options, no two lengths are the same. The durable cold forged cranksets are available in sizes ranging from 135mm to 170mm and use a 110 BCD 5-bolt chainring pattern.

All JIS square tapered cranksets are compatible with all European BSA square tapered style bottom brackets.