Shimano BB-6800 Ultegra Threaded Bike Bottom Bracket

HollowTech II integrated bottom bracket uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency

• HollowTech II integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durability
• Use TLFC37 or TLFC25 in conjunction with TLFC36 adaptor tool for installation and removal