Assuming that your wheel is tensioned enough, the easiest way to check the dish of the rear wheel, is to put the wheel in backwards, and compare its position in the frame with its position when correctly installed. if your wheel is properly dished, then the wheel should sit in the same position regardless of which direction it's installed. Because I'm assuming that you don't own a tensiometer, I can just say with a conventional wheel you should have more tension on the drive side. Exactly 25.19762%