Shimano Ultegra BBR60 Hollowtech II English Bottom Bracket Rim The KTV Drive rear provides

The KTV Drive rear provides up to 10 lumens and five output/flash modes

Lining: Front lined

Wide Tire Clearance: Endurance road bikes often feature increased tire clearance to accommodate wider tires

EVA midsole and rubber sole for pedaling efficiency

Shimano Ultegra BBR60 Hollowtech II English Bottom Bracket Rim The KTV Drive rear providesShimano Ultegra BB72, BBR60 Hollowtech II Bottom Brackets Reduced size for light weight New seal construction for smoother rotation Requires TL FC34 or included TL FC24 adaptor for installation & removal Spindle Interface Type: Shimano Hollowtech II BB Shell Width (mm): 68 Bottom Bracket Shell I. D.: 1. 37 BB Frame Interface: English Defined Color: Black Weight: 77g