Ok, well I met a Land Rover fanatic today at Costco, and he was running the TrXus Mud Terrains. He said they are hard to balance, and don't wear very well... He had about 5 weights on each rim. And with only about 8,000 miles, they had worn significantly. So I'm not so sure about them.
But he also was like, "Your Hummer needs significant modifications, like a new front end and steering gear."
