Hey, ive been having trouble with my disc brakes rubbing. My back wheel pretty much cannot spin on its own without rubbing on both sides. i dont understand how this happened, and i dont really know how to fix it. ive tried messing with some of the alan keys on both ends of the brake housing and using a flathead to try to make the brake area larger. Nothing has really worked so if anone has some advice for me, before i peddle it up a long hill really slowly .
If it's hydro, and rubbing both sides at once then your pistons are over extended. You can normally fix that by taking the wheel off, shoving something like a thin chissel or beefy flathead screw driver in tehre, and levering the pistons apart. It might take quite a bit of levering before they sit back where they should be.
Be careful not to bend the bracket that the calipers mount to.