Shimano XTR SM BB93 Mountain Bike Bottom Bracket Parts Bottom Brackets

Shimano XTR SM BB93 Mountain Bike Bottom Bracket. If you're a legit mountain bike rider, you have to be riding through some muck, mud, water, and dust. Get that like new feeling out of your cranks with a simple bottom bracket change. The Shimano XTR SM BB 93 Mountain Bottom Bracket is 71g of sealed cartridge goodness threaded and ready to get you rolling.