Shimano Ultegra RD-R8150 12S rear derailleur

With the fastest and most precise shifting on the market, the new ULTEGRA R8150 12 speed rear derailleur is more versatile than ever thanks to a single cage length option compatible with small 28-34t sprockets.

-Fastest rear derailleur ever, 58% faster than RD-R9150

-Compact design includes a built-in wireless unit, charger and switch

-LED status indicator

-Battery indicator

-Pairing

-Setting mode etc.

-Increased range capability

-Pinion max. low: 34D