Now simplified with a single derailleur cage length, the 12-speed Shimano Ultegra R8150 rear derailleur packs our fastest, most precise shifting into a more approachable option. With our fastest, most accurate shifting, the 12-speed Ultegra R8150 rear derailleur is more versatile than ever thanks to a single cage length option that is compatible with 28-34T low sprockets. Features Shimano's fastest ever rear shifting, 58% faster than RD-R9150. Compact design includes an integrated wireless unit, charger, and switch. LED status indicator. Battery indicator. Pairing. Adjust mode, etc.. Wider range capacity. Max. low sprocket: 34T.
