Made for use with BMX Race frames with standard Euro BB’s running Square Taper (JIS) Crank sets. These BBs are made from lightweight but durable aluminium cups with quality sealed bearings and super-stiff Cr-mo square taper Spindles. The BB is sized for regular 68mm wide Euro BB’s which are found on most BMX race bikes with a choice of two Spindle lengths (108 or 113mm) to get that perfect crank/frame clearance. Supplied with 2x Spindle Bolts. Size: 108mm, 113mm