Shimano Ultegra BBR60 IT Bottom Bracket cups brand_Altura Shimano SM-CN910 12-Speed Quick Link

Shimano SM-CN910 12-Speed Quick Link

and a breathable AirFlow back panel does away with hotspots and minimizes sweat

Kit contains:

Cuts down on future cleaning and maintenance

Shimano Ultegra BBR60 IT Bottom Bracket cups brand_Altura Shimano SM-CN910 12-Speed Quick LinkShimano Ultegra BBR60 IT Bottom Bracket cups 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