Shimano SM BBR60 (BSA) Ultegra Bottom Bracket, Multicolor

Wider bearing placement and larger axle diameter Seal design has minimal bearing interface Free high efficiency rubber seals keep out dirt, mud and water Sealed cartridge assembly with oversized ball bearings Reduces weight, increases strength and stiffness Use TLFC37 or TLFC25 in conjunction with TLFC36 adaptor tool for installation and removal. HollowTech II integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durability.