Shimano Saint Bottom Bracket Model: SM-BB80 Series: Saint M820 Shell: 68/73mm Fitting: English Thread (BSA) Features: Hollowtech II Colour: Gold Saint This is a brand new Shimano Saint BB-M810 - HollowTech II Bottom Bracket. Key Features: - HollowTech II integrated bottom bracket uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency. - Bearing seal design has minimal bearing interface ensuring smooth rolling and increased durability. - Compatible with any Shimano Hollowtech II Mountain Bike chainsets. - Length of screw thread is increased to enable the fitment of chain devices. - Colour: Gold - Threaded - 68 / 73mm Shell (Spacers included)