1. Loosen both the top and lower brake mounting bolts. Loosen one revolution only, do not remove.
2. Slide the brake down a small amount. Tighten the mounting bolts and test.
If the is to tight repeat step 1 and move the brake up. If the brake still does not engage repeat
steps 1 and 2. If after the brake is moved as far down as possible and still does not engage, it
is time to replace the rear wheel.