Dura ace di2 dual integrated intelligence moves to the next generation tested in competition and taken to victory by pro riders in all conditions including the 2012 tour de france team sky no need for triathletes and time trial riders 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 to choose the perfect gear in any riding position key features the most advanced level of shifti