FX4 with Black out package and 18 in wheels and I'd like to know biggest tires possible without cutting crash bar. Likely will install Ford Performance Fox kit so I gain 2 in level
I have 265/70/18 Falken Wildpeaks, which I originally was going to install on the stock wheels, but ended up with some XD818's that I couldn't pass up. There are others on the forum that have run this size on stock wheels without removing the crash bars or adding a lift. With the new wheels I got, they were 30mm offset and 18x9 wide, so they push the the wheel out further and I ended up needing to remove the front and rear crash bars. I think with the stock wheels it would have been very close?
I went up to 265 65 18 Wildpeaks and there is still room up front. Don't think you could go much bigger without modification. Maybe 265 70 but I'm happy with my choice.