Dura-Ace Di2 9070 Remote Switches for TT (one button)

No need for time trialists and triathletes to choose a shifter position - with Shimano Dura-Ace multiple shift controls are possible. Use Dual Control levers on the base bars and satellite controls on aero extensions. The controls work together - shift from base bars or in the aero position, instantly. The SW-9071 shifters have a single button on the top, and only shifts the rear derailleur. One hand moves the chain up the cassette, the other moves it down.