Shimano Bottom Bracket SM-BB91 BB 42mm

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