Okay I have disc brakes and Horizontal Dropouts. I have never taken the rear wheel off since I bought the bike, but today I needed to change a flat. Well when I tried to take the wheel out I ran into a problem. When I try to pull the wheel out the top of the rotor runs into the top of the caliper. So do I have to unbolt the caliper in order to get the wheel out of the frame? There's gotta be a better way . . .