Quote:
Originally Posted by kjohn6363
Should tire pressure be what is recommended on the tire or what is recommended on the 5th Wheel Plaque?
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The correct inflation pressures for OE tires is displayed on the vehicle certification label, tire and loading placard and in the vehicle owner's manual.
Replacement tires must provide a load capacity equal to or greater than what the OE tires provided via cold inflation pressures.
The PSI displayed on all tire sidewalls is the pressure necessary for the tire to provide its maximum load capacity.
The USTMA says to NEVER use inflation pressures below what has been recommended by the vehicle manufacturer.
Inflating RV trailer tires to the load carried IS NOT a FMVSS standard. It's from the trucking industry standards (FMCSA) and is not applicable for RV trailer tires.
Load inflation charts are not recommendations. They are used by tire installers so they can determine a proper load capacity via inflation pressures that will allow them to set a a proper cold inflation pressure. The charts are most helpful when the installer is determining new cold inflation pressures for larger "plus sized" replacement tires.