Have you checked your placard? If not you might want to as this is the recommended PSI for your coach. You can also call THOR and ask for the weight when it left the factory. I did and found it was within 100 lbs from me weighing it at a scale. In my case, the placard says 82 psi. So I run it at 82 psi. It rides really nice and the tire wear has been very good. Be carful about advice from tire dealers. They want to jack up the psi to the max noted on the tire WHICH IS NOT CORRECT! Good luck and safe driving.
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