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Fixed brake caliper, rear wheel

Fixed brake caliper, rear wheel








1. Hydraulic body

2. Brake piston

3. Brake pad

4. Piston sealing ring


Each brake caliper consists of a hydraulic body (1) divided into two halves held together by bolts. Each half has a brake cylinder, brake piston (2) and brake pad (3). On braking, both pistons press the pads directly against the brake disc.

When the hydraulic pressure is released, the piston sealing ring (4) retracts the brake piston in each brake cylinder to the rest (brake off) position.

To prevent the brake pads from wearing more at the bottom through the self-servo effect of the brake disc's direction of rotation, each piston has a groove which ensures that pressure on the brake pad is greater at the top.

It is therefore extremely important to ensure that the pistons are fitted correctly so that the pads are pressed evenly against the brake disc.