I run Michelins XRV's all around (235/80/22.5) and my tire manual said to run 85 lbs. rear and 90 lbs. on the steer axle and, I was getting tire squirm. My tire guy (at the Les Schwab Tire Store) told me to run 100 lbs. in all tires and it took the tire squirm away. I'm not saying the other poster who told you to do the opposite is wrong, I tried it and it didn't work for me at all. In fact it worked so well for me that I was able to get 10 years out of my first set of XRV's. I'm now on my second set. You might have to experiment with tire pressures for awhile to find out what works for you. Also, (just a thought) the lower tire pressure you run the more your tires heat up! I got that info off of Michelin Tires Website! Good Luck, to you and, I hope your tire problem gets solved tire squirm is a very uncomfortable feeling. P.S. I'm not a tire expert but, I drove over the road for over 4 million miles (semi truck and trailer) before I retired in 2010 and, I had everything that could possibly of happened to me with tires, happened, I have a lot of experience in dealing with them.
