I’m running a pair of tech 2’s and went to the bike yesterday and realised by rear brake was not working, on closer inspection it became clear that one of the pistons was not moving freely/at all and just wondered if anyone out there had any tips on freeing the piston up? It’s quite difficult IMO to get to the piston as the caliper is a sealed unit, I have been told to use some type of lubricant around the edge of the piston and then work that into the piston by squeezing the brake lever but as a said IMO it’s very difficult to get in there and the piston don’t seem to want to move!!!!
Any one else had this issue and any help appreciated…