I bought a second-hand mountain bike which as far as I can tell has not been well maintained. The pads were very worn so I replaced them and replaced the disks. Now they keep rubbing.
The brakes will almost certainly need to be bled but I'm not sure if something else needs to be done. I tried pushing the pistons back several times but as soon as I brake they get stuck again and do not go back in.
I tried cleaning and lubing the calipers but to no effect. I tried realigning the caliper was unable to do so.
Is it likely that bleeding the brakes will solve this or does more need to be done?
I'm not sure what else I could do other than replace the brakes entirely.