With the fastest and most precise front derailleur on the market, the new ULTEGRA R8150 12s rear derailleur is more versatile than ever, thanks to a single cage length option compatible with min. 28-34D.
- Faster than ever chainring, 58% faster than RD-R9150.
- The compact design includes an integrated wireless unit, charger and switch.
- LED status indicator.
- Battery indicator.
- Pairing.
- Adjustment modes, etc.
- Wider range of ratios.
- Pinion max min .: 34T.
