BB86/92 Technical Info

BB86/92 (PF24) is a pressfit BB system. Bearings in cups are pressed into the frame, similar to the PF30 system. Requires use of 24mm or 24/22mm cranksets.

Final width of system is equal to a frame with outboard threaded BB cups installed (BSA standard).

  • Shell Width: 86.5mm (road) or 91.5mm (mountain)
  • Shell ID: 41mm
  • Bearings are contained inside cups which are pressed into the frame; shell has a stepped design but there are no snap ring grooves
  • Designed specifically for 24mm (Shimano, FSA, etc.) and 24/22mm (SRAM, Truvativ, etc.) spindle cranksets originally intended for external threaded cups.

BB86/92 Bottom Brackets