Just today I got a set of 31x10.50R15 Runway A/T's and they fit good. Uninflated I measured them to about 30 1/8" so I decided to go for it. I've got no lift on my Navajo, and they only rub at full lock if I hit something. I am still going to trim my inner fenders and the back of my bumper a smidgen, and possibly throw in the skyjacker 2" lift coils when I get new shocks, we'll see how it does when I beat on it. They really look like they belong there, but the old 235x75r15 Michelins looked kinda wrong on it.