Shimano XTR BB94-41A Bottom Bracket Designed to fit 89. 5mm to 91mm press-fit bottom bracket shells, the Shimano XTR BB94-41A shaves 18 grams from its predecessor and offers improved sealing from harsh elements. A composite shell houses and seals steel bearings with an incredible attention to tolerances. This is a premium level bottom bracket offering the maximum in power transfer and a lighter rotational resistance. A solid drivetrain addition for any rider. Features: For Press-Fit 89. 5mm to 92mm bottom bracket shells Compatible with Hollowtech II cranksets Axle Diameter 24mm 37x24x8mm steel bearings | Shimano | Sm-Bb94-41A Bottom Bracket Press Fit Bottom Bracket