Welcome back Melbourne!

Search Now


Shimano Press Fit MTB Bottom Bracket 42mm 84.5mm SM-BB91


Availability: In Stock

Shimano BB91-42A Press Fit Bottom Bracket, XTR quality, compatible with all MTB hollowtech 2 chainsets.
  • Complete XTR level press-fit bottom bracket assembly for Shimano HollowTech II MTB cranks
  • Cups are made from fibre reinforced polymer material which reduces the risk of frame noise and damage
  • Set includes left and right hand cups, 2.5 mm spacer
  • Sealed cups keep out dirt and water
  • Maintenance free
  • Compatible with 89.5 mm (with 2.5 mm spacer) and 92 mm shells
  • 42 mm cup diameter
  • Easy press-fit installation
  • Please note - not supplied with inner sleeve