Topic starter
Managed to pop a piston out of one of my MT30 callipers and now it is leaking after refitting.
Can't seem to find a replacement readily available. Are other Magura 4 piston callipers compatible?
Posted : 15/03/2026 4:18 pm
Are you sure is is leaking? Is it not just mineral oil that got past the seal subsequently oozing out? The best way to be sure would be to remove the caliper and totally strip it and clean it. A pinched seal or a cracked piston would leak, but there is not much else that would cause a leak.
Posted : 16/03/2026 9:52 pm
It's very easy to damage or twist the square-section seal while re-fitting a piston. That will cause a leak as well 😉
Posted : 17/03/2026 10:25 am