Thanks guys! My air pressure right now is at 35 psi. I did just get some new tires put on...Suretrac Wide Climber MT's. They are E-rated again (3 ply sidewall), but I got a really good deal on them so... For some reason they actually seem less stiff and ride smoother than the Toyo's I had on. Was thinking that maybe all those thick side lugs on the Toyos were contributing to the excessive sidewall stiffness, but that's just a guess. I'm so far loving these tires and the super aggressive tread pattern.