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

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• 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, inner cover, and inner O-rings
• Sealed cups keep out dirt and water
• Maintenance free
• Compatible with 84.5 mm shells
• 42 mm cup diameter
• Easy press-fit installation
Package ID: Small_Package