I'm looking to buy new rim's and tires. I have 4" of suspension (springs) lift and plan on getting 33's or 35's. I know I will probably need a trim if I go with the 35's. (anyone able to confirm this?) My question is this: What advantage or disadvantage will 15x10's offer vs 15x8's? From what I gather, the 10's will make a wider footprint, while the 8's would make it a bit taller. But what about airing down? Would the 8's offer a better bead in aired down conditions? Lastly, I'm wondering about backspacing. How much is the most I can run and still clear my caliper/dustshield? I want to try to keep them tucked under the fender as much as possible in an effort to protect my body work.