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"It's a pity that it doesn't have the same external dimension as the old one, because the aesthetics aren't great".
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Designed for frames with 70 mm (Italian standard), the SHIMANO Dura-Ace 9100 Italian bottom bracket features bearings that are even smoother and more sealed than the previous generation.
The bearing size has also been revised to reduce weight.
| A - Diameter (mm) | B - Width (mm) | Assembly | Standard |
| 34,8 | 68 | threaded | BSC / BSA |
| 34,8 | 73 | threaded | BSC / BSA |
| 34,8 | 83 | threaded | BSC / BSA |
| 34,8 | 100 | threaded | BSC / BSA |
| 27 | 95,5 | to insert | BB 96 (Trek) |
| 41 | 92 | to insert | PF 92 |
| 42 | 68 | to insert | BB 30 |
| 42 | 73 | to insert | BB 30 |
| 46 | 68 | to insert | PF 30 |
| 46 | 73 | to insert | PF 30 |
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Ref: 7970330345638
Optimal sealing
Maximum fluidity
Lightweight
Axle Diameter : 24 mm
Bearing Material : Aluminium
Axle Type : Through Axle
Bottom Bracket Type : Italian (70 mm)
Overall rating: 4.6666665 / 5 from 3 reviews.
Review topics: [].
"It's a pity that it doesn't have the same external dimension as the old one, because the aesthetics aren't great".
"70 mm center-to-center Italian thread (not straight on either side) Quiet and lightweight."
"SHIMANO product, what more can I say, and trouble-free mounting with the adapter supplied."