Shimano 105 SM BBR60 Bottom Bracket BSA Threaded Hollowtech II Road Bicycle Bike
Ultegra BBR60 Hollowtech II Bottom Brackets. Spindle Interface Type :Hollowtech II. - 1pcs 105 SM-BBR60 Bottom Bracket. Series : ULTEGRA 105 TIAGRA SORA. Bottom bracket with small ball bearings for lightweight.