This was a joke, the Jeep jamboree had a max tire size requirement of 40"... lol43's are overkill. Shoot, I did all the Hammer trails on DOT 37's at 30 psi. The road maners of a 40" radial will be soo much better than any 43 you decide to run. Your 40 is set up well, had good travel. Just drive it. The extra strain on the drivetrain comes into play too. I broke Chromoly 35 spline D60 axles shafts on 37's. Now I run 300M RCV's. and 40" stickies.