Shimano ultegra
Bottom bracket
Threaded
Hollowtech ii
68 70 Mm shell widthwith reliable shimano bearings and seals, the shimano ultegra bottom bracket has a long service life.Key features:hollowtech ii integrated bottom bracket uses a wider bearing placement and larger axle diameter for increased stiffness and efficiencyhollowtech ii integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durabilityuse tlfc37 or tlfc25 in conjunction with tlfc36 adaptor tool for installation and removalspecifications:shell type: externalshell width: 68mm english or 70mm italian
