Size: The bicycle V brakes Arch size:110mm (4.3inches), Brake Pads Size:55mm(2.1inches). Suitable for most V-type brakes bike Material: This V Brakes strong and durable enough for using long time. The brake arm is made of aluminum alloy, solid and not easy to break. The brake pad is made of hard-wearing rubber, resistance to cold, heat and oxidation, not easy to deform. This Bicycle Brakes can provide great braking power on bike rim in both dry and wet conditions Install: 1. Screw the fixing hole of the brake corresponding to the body fixing hole; 2. Pass the brake wire through the brake wire tube in sequence, and fix the position of the metal wire tube; 3. Fix the brake line on the bolt, then install the brake leather, adjust the distance, position and length of the brake line, and then fix the brake line firmly Stop smoothly with less noise: the grooves of the brake pads can effectively prevent sand or stone damage the wheel rims; The slightly curved design can provide better braking power and reduce stopping distance smoothly with lees noise Wide applications: This universal V-brakes compatible with both front rear wheels of MTB BMX mountain bike road bike folding bike hybrid bike. Note: you need to confirm whether the front and rear wheel of your bike has the mounting hole of this type of brake before your purchase