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- Shimano's fastest ever rear shifting, 58% faster than RD-R9150.
- Compact design includes an integrated wireless unit, charger, and switch.
- LED status indicator.
- Wider range capacity. Maximum low sprocket, 34T.
- Direct mount.
- Maximum front difference 16T.
- Top sprocket min and max 11T.
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Review Shimano Ultegra RD-R8150 12-Speed Rear Derailleur
