I seem to be having a run of nasty mink on my disc brakes and I think it might be due to some leakage round the pistons on my XT disc brakes.
I had the same problem last year on one brake and replaced the caliper, which seemed to sort it but I don't want to have to be buy new calipers again.
If everyone reckons they do leak, any recommendations for alternatives (are XTRs better)?

