Oh my god what a mess. All you have to do to check if your wheels are out of dish are put the wheels in your frame, and fork, and see if the fork arch and frame are the same distance away from the tire, more specifically the rim. Get a tape measure or a pen and mark how far each side is away from the frame and fork arch. What is the problem anyway....the brakes dont work good? Its probably the angle of the pads or something....the wheel would have to be WAY out of dish to have the brakes not work well.