Just the same as for Dura-Ace Di 2. Changing gears becomes easier, effortless & faster by simply touching the electronic shift buttons. Control at your fingertips. Additional benefits include an automatic trimming front derailleur, great accuracy plus easy adjustment & installation. Di 2 continues its great success with Shimano Ultegra. And it makes no difference if these roads are cobbles, tarmac or mud. Choose your requested
Specification below & just add to cart Note: All groups comprise, Rear mech, front mech, Sti levers, cassette, chain, chainset, b/b cups, brakes & standard cables.