Tire pressures and axle weight

I also own a Winnebago and tire charts giving to me were bogus! Both manuals Michelins and Winnebagos both said to run my tire pressure at 85 lbs. rear and 90 lbs. front. This didn't work for me due to I was experiencing tire squirm on the rear axle. What I did is take notes on the handling of my coach every time that I went out camping using different tire pressures. I settled on 100 lbs. all around! These tire pressures worked so well for me that I was able to get 10 years out of that set of tires. I'm now in my 3rd year of my second set tires. You have to experiment to see where you get the best ride! What works for me possibly will not work for you! And remember the lower tire pressure you run the more heat build up you will have inside your tires. I'm not a tire expert far from it but, I have a lot of knowledge about tires from being a truckdriver who logged over 4 million miles over the road. I'm now retired after 44-1/4 years of driving. I've never weighted all 4 corners of any of my RV's and I have been RVing since 1976. My last and current coach that I bought new in 2004, I weighed my front and rear axle with all tanks being filled when my coach was new and I was overweight! So I never bothered to weight again! Good Luck, Rooster