I took my rear tire off to fix a problem with a broken strut, and I noticed that its almost impossible to turn the axle. It requires 30 lbs or more of pressure and I can barely do it with a screwdriver. It appears that the brake pad is touching the rotor. I am not sure if that is the main cause of the resistance though. The parking brake is not enabled. Is this cause for concern? How hard should it be to turn the wheel? How can I isolate the problem? Take off the brake? Can it be adjusted? Thanks!