Shimano Dura-Ace Di2 SW-R9160 Bar End Shift Levers 2x11-speed left+right: With Di2 technology shifting is easy and precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear
Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold TT / Triathlon single button bar end shift switches are used to operate both front and rear derailleur's with synchronized shifting