The Simson Cantilever brake shoes 72 mm are suitable for Shimano cantilever braking systems. The brake shoes have a non-symmetrical stift, and are suitable for both front and rear brakes. Use an Allen key to remove the worn brake disk from the brake. Mount the new brake shoes with an Allen key in the right direction, on both sides equidistant from the rim. The Simson Brake shoes are supplied per two pieces.