Shimano Dura Ace Di2 ST 7970 Dual Control Levers Parts Electronic Shifting Parts

Shimano Dura Ace Di2 ST 7970 Dual Control Levers. The Shimano Dura Ace Di2 group delivers shifting performance like none other. Seriously, this setup is awesome. With electronic shifting you get smooth, precise shifts with instant engagement, no matter what the riding conditions are like. These shifters use electronic touch pads to give you more rapid action with a lighter feel. They also have carbon lever blades to help shed every last gram possible.