I am having a major problem with the brake. The pads are engaging to the point where they are completely clamped down on the rotor. Wheel won't spin at all. I have taken off the caliper, retracted the pads all the way back, and replaced. As soon as the brake is applied, it is clamped down again. So when I release the brake lever, the pads do not back out at all. I have bled the brakes to see if it will make a diff. It does not. Any thoughts before I try to get them warrantied?