Originally Posted by historyljc
I stand corrected, there is no difference between the F & G as to the air pressure settings and load. In the size tire that I use, there is a considerable reduction possible in pressure by going up a load range. I was able to drop down 10 lbs of pressure for the load I'm carrying resulting in a much softer ride and better steering. My coach now has the 275/80R22.5 LRH XZA3 replacing the original LRGs carrying a weight of 11120 pounds. It was on this that I based my statement which apparently does not translate to the size tire that you have.
You are correct in your case. Michelin chooses to use European standards (Michelin's answer) on some sizes of their tires. These standards are different than RMA (US) standards. That is why you could reduce PSI.
Again so no one misunderstands, this is the exception and not the norm. Always weigh your coaches four corners and adjust PSI according to the manufacturers charts.
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