This is a Shimano SM-BBR60 Bottom Bracket Unit. Weighing in at 77g, the SM-BBR60 Ultegra Bottom Bracket is 14 grams lighter than the 6700 bottom bracket offering professional level technology for the everyday cyclist.
Features:
Specifications:
Weight: 77
BB/Frame Interface: English & Italian
Spindle Interface Type: Hollowtech II
BB Shell Width: 68mm English