Token Press Fit 386 Bottom Bracket For Shimano 24mm Crankset - BB386APS For BB386 press fit frame (&oslash;46x86.5mm) reduce to Shimano &oslash;24mm crankset &oslash;46mm Alloy CNC cups for strength, stiffness and precision PF FIBER plastic cups allow for better frame tolerance High Rolling Sealed Bearings