I want to use a single beadlock wheel in 15inch on the rear with a 275 60 drag radial. I do not want to roll the fender lips or notch the frame. What size rim and what back space do I need to make this work? I am going to run 17x4.5 on the front. Please I have search and I don't want to make a mistake so that is why I am asking. My body is square as I have the same amount of space on both sides now with the gnx wheels.