Disc brake capability, using Shimano's Center-lock rotors.
Increased efficiency Shifting power modulator for smoother shifts Complete parts kit included. Shifter w/cable included. Non-turn washers Green & Blue set (for vertical dropouts) Included! Non-turn washers - Blue & Green set (for vertical dropouts) Included! Note: Comes with 20 tooth standard Nexus sprocket - not the one with plastic guard)