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Mountain Bottom Brackets

Shimano XTR SM-BB94-41A Press-Fit Bottom Bracket


The Shimano Press Fit BB94-41A bottom bracket is for frames with the non-threaded BB86/92 Pressfit specification. These frames will have a shell width that is 86.5mm (road) or 91.5mm (mountain). The shell inner diameter measures 41mm. The bearings are contained inside cups which are pressed into the frame and the shell has a stepped design but there are no snap ring grooves. The BB86/92 spec is designed specifically for 24mm spindle cranksets originally intended for external threaded cups.

This is the mountain version however the only difference is the length of the optional inner sleeve between the two cups.


  • For use on BB86/92 bottom bracket shells
  • Compatible with 24mm spindle Hollowtech II cranksets
  • 55 grams
  • Includes inner sleeve