Zoom 4-piston Hydraulic Disc Brake Kits Front Rear for Ebike Electric Bicycle
Zoom 4-piston Electric Bike Hydraulic Disc Brake Kits For Ebike. This is 4-piston hydraulic disc brake kits, has better braking force and performance than single piston. Specification: 1. 4-piston Front and Rear Hydraulic Disc Brake;.