Pair of XT brakes just over a year old. Last month the rear suddenly had no power and squealed like a banshee. However they came back after dragging them down a long hill. Contaminated Pad / Rotor I though. Must have got a bit of lube on them.
Cleaned the rotor and pads and they worked a treat for the one ride. Put bike away and next time come to use it and same problem. I’ve bled them also.
Again, dragged them down a long descent and they were fine for the rest of the ride, then once again… next ride they are the same.
Any ideas what may be causing it ? I cant see any brake fluid on the calliper.
Cheers all.