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Old 10-24-2010
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bwinter1946 bwinter1946 is offline
Senior Member
Join Date: Mar 2009
Location: Madera
Posts: 4,103

FWIW I have never been told to only inflate a tire to 115 PSI that is rated for 120 PSI. The manufacturer and most guides say to check the tire pressure when cold. It is normal for pressure to rise as the tires warm. I wonder if the person making this recommendation is trying to leave room for the tire pressure to rise after driving. I don't believe that is necessary. If the tire is rated for 120 PSI I think that pressure is what can be measured when the tire is cold.

Now having said all this, your pressures will need to be set once the coach is weighed on each corner. That will drive you to the correct pressure for your coach for the weight each corner is holding, plus 5 PSI for a safety margin.
Brad Winter
Madera, California
1997, 37' BMC
1999, Jeep Cherokee, Toad
1970, VW Baja Bug, Alternate Toad
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