I have an idea of how this works but please elaborate if you don't mind. I'm ready to buy some bigger meats for my Troop...probably 285/75's although I have been considering 315/70's. I have been thinking of different rims to go along with the tire purchase...currently I'm running the stock 16's. How does the backspacing work? Can I just buy rims that are "deep dish" and have backspacing already incorporated into them or is there some kind of a spacer that I can buy to achieve the same effect? I want my tires to stick out a couple inches from where they are right now. Thanks.