Originally Posted by DavidAndDonna
-we just purchased an Avalanche 312RS and I'm looking for a load rating chart for air pressure.
Do you have a load inflation chart?
There is no "built in reserve capacity" with ST tires like there is in LT tires.
Load capacity is based on air pressure (not ply rating), so it's the air that gives you the "ability to carry more weight".
All manufacturers of travel trailers take that into account when fitting specific tires to their trailer. The recommend tire pressure placard on the front right of the trailer should be followed.
Is there a reason you don't want to tow at recommended pressures???