Shimano ST-9071 Dura Ace Di2 TT Shifters
These shifters are compatible with both Ultegra Di2 10-speed and Dura-Ace Di2 11-speed systems. No need for time triallists and triathletes to choose a shifter position - with Di2, 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. Easy to version up for TT/Triathlon option.