Ultegra BBR60 Hollowtech II English Bottom Bracket Small (50-53) Brake pad compound provides superior

Brake pad compound provides superior performance in wet conditions

Largest Cog: 34

These 5 mm thick CNC-machined alloy X-GlideR chainrings provide optimized stiffness and shifting performance featuring specific ramps and pins to aid chain transition

Brake Lever Actuation: Short Pull

Ultegra BBR60 Hollowtech II English Bottom Bracket Small (50-53) Brake pad compound provides superiorShimano Ultegra BB72, BBR60 Hollowtech II Bottom Brackets FEATURES: Reduced size for light weight New seal construction for smoother rotation Requires TL FC34 or included TL FC24 adaptor for installation & removal SPECS: Spindle Interface Type: Shimano Hollowtech II BB Shell Width (mm): 68 Bottom Bracket Shell I. D.: 1. 37 BB Frame Interface: English Weight: 77