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. Bottom bracket with small ball bearings for lightweight. Advanced seal construction for smoother rotation.
|DURA-ACE R9100 Series
|Hollowtech II Bottom Bracket