the backspacing is 4" the tires are 305/70/16 . They are Pro Comp Rock Crawler 87 series (part # 87-6883)
I have a 3" light racing coilover lift in front and 2" springs with bilsteins in back. i have not had any rubbing at all yet. I did trim my front body mounts. this is 100% needed. there is about 2" between the tire and the upper control arm. i have not had it tweaked enough to see if the whole tire will fit in the rear fender but from these photos and me checking it out it looks like it should be fine