Originally Posted by
Mike W
Most likely the backing plate for the brake disc is rubbing on the rotor. You can bend it into the brake rotor by pulling on it unintentionally. It makes an awful racket but does not cause much damage if any. You can almost fix it usually by just pushing it away from the back of the rotor with a long screw driver (pushing through the wheel spokes). Or just take the wheel off again and look and see if it is touching the back of the rotor. You can just push it away with your hand.
Mike W