Your brake is dragging and the brake pistons aren’t pushing out evenly? This is usually caused by dried out sealing rings and slightly seized brake pistons. Here’s how to remobilize the pistons of your disc brake in a few easy steps and get the best performance out of them.
Tools you’ll need: a Torx T25, a torque tool, a strong rubber band (or an assistant), worn brake pads (optional)
1 – First loosen the mounting screw of the caliper slightly until the caliper can be moved freely to the side. During the process, fix the lever blade in the actuated position with a rubber band or ask an assistant to actuate it. Tip: Use optional worn pads to increase piston movement – this will increase the degree of mobilization.
2 – Press the caliper sideways against the disc until the piston in question is fully retracted. Repeat the process several times on both sides.
3 – After doing this a few times, check whether both pistons are extending more evenly and continue the procedure if necessary. In most cases, you’ll notice a positive effect after only a few ‘piston sessions’.
4 – Align the caliper centrally over the rotor and fix it. Important: Maximum 6 Nm tightening torque. Finally, check the brake for safe operation.
We strongly recommend that you read the enclosed manual/operating instructions before using MAGURA products. Always observe and follow all instructions for assembly, operation and maintenance in this manual and the operating instructions of other manufacturers whose products are used on your bicycle – and please don’t overestimate the products’ abilities. Have assembly and maintenance work carried out in a specialist bicycle workshop or in an authorized MAGURA Service Centre, where a professional job is guaranteed.