Shimano BB-R9100 Threaded Bottom Bracket
SHIMANO 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
MODEL NO: BB-R9100
HOLLOWTECH II BB Type: Threaded bottom bracket type
Threaded BB Shell Width: 68mm, 70 mm
Mfr Claimed Weight