with a 2" lift you should be able to stuff a 31 in there without much trouble, but any wider than 9.5" and you'll rub at full lock without increasing the backspace on the rims. I plan on a 2" lift and eventually 31x10.5's on stock rims. I have no issue with minor rubing.... My tires rub slightly when i hit the stop on the right turn, but not an issue cause you dont steer that hard normally anyway.