Get ready to conquer any terrain with the Shimano Ultegra Rear Derailleur RD-R8150 12sp. Our fastest and most precise shifting yet is now available with a single cage length option, perfect for 28-34T low sprockets. Don't settle for less, chase your next challenge with confidence and speed.
Our fastest ever rear shifting, 58% faster than RD-R9150
Compact design includes an integrated wireless unit, charger, and switch