With Our Fastest, Most Accurate Shifting, The New 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:- Fastest Ever Rear Shifting, 58% Faster Than Rd-R9150- Compact Design Includes An Integrated Wireless Unit, Charger, An… Open full product description
