I own Michelin tires and my recommended PSI to weight on my coach is 100 lbs. according to the chart on Michelins website. The recommended tire pressure without all the weight I carry is 85 lbs. rear and 90lbs. front. Keep in mind the less air you have in a tire, the more tire you have touching the road surface so therefore the tire is creating more heat. It says that on Michelins website. I like you am not happy about the harsher ride at 100 PSI, but I enjoyed running my tires for 10 years do to proper air pressure, quality tire, quality maintenance.