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.

Specifications
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
65g