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Inflating tires on your trailer to the load carried is not the way it’s supposed to be done. That method comes from the commercial carrier industry and is really not applicable for vehicles, such as yours, built under the guidance of FMVSS.
Here is an excerpt from the RV section of the USTMA.
“Inflation pressure recommendations may also be determined based on the tire manufacturer’s specifications, which define the amount of inflation pressure necessary to carry a given load. These inflation pressures may differ from those found on the vehicle tire placard or certification label.”
“However, never use inflation pressures lower than specified by the vehicle tire placard, certification label or owner’s manual. Nor should inflation pressure exceed the maximum pressure molded on the tire sidewall.”
In accordance with tire industry standards, inflation pressures for replacement tires must first be set to an inflation pressure that will ensure they provide a load capacity equal to or greater than what the Original Equipment tires provided.
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