My discs have a lip on them preventing the caliper being lifted off.

Given that the piston needs rotating to push it back, how do can I do this with the pads in the way?

Zooom, March 2010

Thanks wirecutterman,

That would have been the next thing that I'd have tried but in the end once I realised what needed pushing in what direction it was quite simple to remove the pads.

The only slightly awkward bit is pushing the piston back - it needs to be rotated whilst being pushed in - not easy without the proper tool - but it can be done.

Zooom, March 2010

get a 4" grinder and grind the edge of disc to remove the lip on both side's of disc then measure the disc thickness to see whether still in makers (service limit )as replacement's may be required.

wirecutterman, March 2010