MEROCA MTB Bicycle Hydraulic Disc Brake 2 Piston Aluminum Alloy Mineral Oil Front 800 Rear 1400MM Oil Press Brakes Bike Parts Color:Purple Left Rear The professional model has 3

The professional model has 3 bearings inside

Model: XM70

42mm is about 12

24mm is about 5

MEROCA MTB Bicycle Hydraulic Disc Brake 2 Piston Aluminum Alloy Mineral Oil Front 800 Rear 1400MM Oil Press Brakes Bike Parts Color:Purple Left Rear The professional model has 3Meroca Mtb Bicycle Hydraulic Disc Brake 2 Piston 160mm Rotor Caliper Aluminum Alloy Mountain Bike Brake Pads Oil Pressure Rotor Brand: MEROCA Model: MT500 Color: black, red, blue, purple, gold Material: aluminum alloy Weight: about 645g Length: front 800mm; rear 1400mm. Application: 160mm discs (installing other size discs need to purchase the corresponding adapter) How to distinguish the brake that suits you: There are two specifications for bicycle