Shimano Dura Ace BB-R9100 Hollowtech II Bottom Bracket 68mm

SHIMANO DURA-ACE – Bottom Bracket – Threaded – HOLLOWTECH II – 68/70 mm shell width

With an advanced seal construction for smoother rotation and small ball bearings to minimize weight, the SHIMANO DURA-ACE bottom bracket is offered in both pressfit and threaded options.