Clarks Sync-2E E-Bike Hydraulic Brake Set With Motor Shut-Off 180/160mm Rotors Dual Pistons - Open Hydraulic System E brake for Electric bikes, with sensor control design cutting line. The SYNC2e consists of a 2 piece forged calliper allowing internal maintenance, the brake is specifically designed for use with E-bikes and has an automatic motor shut off when the brake lever is applied resulting in safe braking. Sensor Control waterproof contact, 3 fingers lever length.