Best advice I can give you is have the tire dealer try them on your vehicle. I know the 31" X 9.5 will fit on a YJ on non-stock rims... I have that set-up. But they WILL rub on the fenders under articulation (even the street kind!). Mine came like that, so I have not changed it, but I do plan to lift my rig, and put 33" tires on it (maybe even bushwacker flares so that I can cut the wells).
Felipe