I had to experiment with tire pressures to find out what worked for me. I run Michelin XRV on all of my coaches and Michelin & Winnebago both recommended 75 lbs. PSI rear and 90 lbs. PSI for the steer tires. I do not like to run tire pressures on the low side due to lower tire inflation contributes to higher heat build up. Plus I was getting tire squirm from the rear tires. I ran different tire pressures every time I went out RVing and I found I got the best handling at 100 lbs. PSI all around. And that tire pressure works for my RV also due to long tread and tire wear I got 10 years out of my last set of Michelins. Good Luck on whatever tire pressure you choose.