Features1Shell adopts good quality high carbon steel manufacturing, brake will not deform slightly, brake extremely sensitive. 2Safe test data, wear resistant life test > 50000 times, braking friction > 2200N, braking temperature resistance > 120, braking low noise designed, safe and ecofriendly. 3Brake shoe block made of high temperature friction material manufacturing, with nearly 50,000 times of friction experiments, will never produce high temperature fatigue, brake more sensitive. 4High quality stoving varnish surface treatment, front with fixed position for convenient installation and disassembly. 5With variable hole cushion, lithium battery electric bike can used.SpecificationCondition:Item Type: Electric Bike Rise BrakeModel: 90 Type(Hole Diameter 14MM)Material: High Carbon SteelColor: As Pictures ShownLock Key:Built-in Button BatteryWeight: Approx. 753gSize: Approx. 24x11cm/9.45x4.33inchPackage List1 x Electric Bike Rear Wheel Rise Brake Kit