Synchronized Shift
Synchronized Shift is one of the most powerful, unique features of Di2. Map your shifts to a single shifter and control both front and rear derailleurs with one hand. Using E-Tube, you can set where your front derailleur shifts between rings. Whether you prefer a smaller ring for cadence, or a bigger ring for torque, you can position the shifter for the best progression through your gears and maintain the best possible chainline.