MWMNUN 15mm Rear Brake Assembly Master Cylinder Caliper Replacement for Coolster SDG SSR 107 110 125 I BK12

The MWMNUN 15mm Rear Brake Assembly is designed for most Chinese-made pit bikes featuring a 15mm rear wheel shaft. This assembly includes a master cylinder and caliper, complete with DOT3 brake fluid and an installed brake pad. It also comes with an additional set of brake pads as spare parts. The brake tubing measures 21.5 inches (550mm) in length, and the master cylinder mounting hole central spacing ranges from 1-5/16 to 2 inches (34 to 51mm). Please ensure compatibility with your bike's specifications before purchasing. • Fits 15mm rear wheel shaft for most Chinese pit bikes • Includes master cylinder and caliper • Comes with DOT3 brake fluid and installed brake pad • Additional brake pad included as spare • Brake tubing length: 21.5 inches (550mm)