I saw that Buzz. Also, my current tires are just a might larger than stock. According to the difference between my GPS and my speedometer and odometer.
I used to run 35" tires and they were exactly 10% off. (Easy to calculate true speed and mileage when not wanting to run the GPS)
Also, my truck seemed to like the lower RPM of taller tires. I turn a hair over 2K rpm at freeway speed. Stock tires were 2200 RPM and my old 35" BFG tires were at 1800RPM. I got better fuel economy with the taller tires but needed to downshift more often of course on hills and such.
The whole shebang; truck and camper combo, are already pretty darn tall. Adding another 3+" over stock tires puts another 1 1/2 or more to that height. Not a big deal. Or... is it? Surely, that can't HELP the side-to-side sway. The taller sidewall as well...
Then there is the width; I've heard tell a narrower tire will provide less sidewall flex. I know a shorter tire, with it's shorter sidewall will flex less, but how about wider?
And finally, I want to maintain my 4X4 functionality when it comes to chain controls on the highway. On occasion, I venture up into the mountains and discover there are chain restrictions for the trip home. (I don't head up with controls up, but have been caught coming back) So I guess I want a rated tire that saves me from chaining up this rig. Tire longevity is not a big concern. I rarely wear out a tire before it's just too old to be considered still safe. Suggestions?