I ran 30x9.5x15's on my XJ just fine before the lift.
They would rub a little at full turn when I was turning around on steep hills but not enough to do any damage.

The offset on the rims your using will make a difference.

The tires I ran on stock rims were fine but I tried a set of 30" Mud terrains on steel rims and they hit the fender well before full turn.