Shimano Dura-Ace BB-R9100 Bottom Bracket — BSA Threaded 68mm, HOLLOWTECH II, Roa
The Shimano Dura-Ace BB-R9100 is a flagship BSA-threaded HOLLOWTECH II bottom bracket with a low-friction seal design that reduces drag for smooth, efficient pedaling.
Flagship Dura-Ace HOLLOWTECH II bottom bracket — genuine Shimano, brand new.
Will it fit? BSA English-threaded, 68mm shell, for HOLLOWTECH II 24mm spindle road cranks. Not for square-taper, BB30/PF30, or 86.5mm press-fit shells.
Key Specifications
Brand | Shimano |
Series | Dura-Ace R9100 |
Model | BB-R9100 |
MPN | BB-R9100 |
UPC | 689228858619 |
Type | Bottom Bracket |
Interface | HOLLOWTECH II (24mm) |
Thread | BSA (1.37×24) |
Shell | 68mm |
Seal | Low-friction |
Weight | 65 g (2.3 oz) |
Color | Black |
Country of Origin | Japan |
Condition | Brand new — original Shimano packaging |
Technology Highlights
✓Low-friction seals cut drag ~50% vs prior gen.
✓HOLLOWTECH II 24mm spindle fit.
✓BSA 68mm threaded standard.
✓Dura-Ace precision bearings.
What's in the Box
1 × Shimano Dura-Ace BB-R9100 bottom bracket
Original Shimano packaging
Brand new in retail packaging. Ships from Ontario, California (US domestic) · Estimated delivery 3–5 business days · Free 30-day returns.
