Fit most bikes: HAIKS ZOOM HB876E hydraulic brakes caliper have four piston oil pressure, Front 950mm and rear 1850mm ZOOM HB876E hydraulic disc brake set left front and right rear. Brake levers are made of high-end aluminum alloy, idea for all mountain bikes, electric ebike, scooter, folding bike, fat bike etc Massive stopping power: The hydraulic brakes for mountain bike is an upgrade kit from the mechanical disk brakes system, you can stop with two fingers only, ideal for trail riding,downhill, choppy mountain，snow, beach, flat road etc Quiet Braking: HAIKS hydraulic bike brakes adopt integrated hydraulic cylinder to prevent oil leakage, The brake pad is made of resin-metal composite pads, which not only ensures quiet when braking, but also protect your disc rotors Installation Instructions: Make sure the calipers and pads correctly fitted to the hub and aligned with the disc. Adjust the clearance and fine tune the brake adjustment screws to ensure good braking without clicking. Exhaust the hydraulic disc brake system to maintain optimum performance. Pull the brake handle to test if the brakes are contacting the disc to make sure the braking effect is normal Easy To Install : HAIKS ZOOM brake set is easy to install, just getting the brakes properly aligned and the right cable tension. Unboxing ready to install and use. If you have any questions for HAIKS brakes, please fell free to contact us HAIKS ZOOM HB876E hydraulic brakes caliper have four piston oil pressure, Front 950mm and rear 1850mm ZOOM HB876E hydraulic disc brake set left front and right rear. Brake levers are made of high-end aluminum alloy, idea for all mountain bikes, electric ebike, scooter, folding bike, fat bike etc