Boy, this thread has run the full range from accurate to bizarre.
FACT: The GVWR sticker installed by the coach manufacturer is for the OE tires (yup, they DO know what they put on there) when loaded to GAWR.
Please provide facts that are contrary to this statement.
And, no, I would never suggest any method of accurate tire pressure determination without weighting each wheel position. Then, take the heavier wheel position on each axle to determine the correct minimum PSI for all tires on that axle from your tire manufacturers inflation table.
Unlike car tires, the correct PSI for the tires on our coach (per Michelin, not me) is 70 or 110 DEPENDING ON LOAD. That is a huge range and over or under inflating is quite likely if you don't know your actual weights.
