Shimano Ultegra SM-BBR60 Bottom Bracket 68mm Hollowtech

Genuine Shimano Ultegra SM-BBR60 Hollowtech II 2 piece bottom bracket assembly includes left and right hand cups, spacers, inner cover, and inner O-rings. HollowTech II integrated bottom bracket design uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency. Seals have minimal bearing interface ensuring smooth rolling and increased durability. Housing width: 68 mm Anodized bearing shells Small ball bearings for low weight Inner bearing cup: aluminium Inner bearing sleeve: GFRP Approx weight: 75g