Originally Posted by cwall59
Yes they are original.
No one likes to play by the rules for RV trailer tires so I can only tell you the way it's supposed to be done.
All of NHTSAs publications are going to tell you that the correct inflation pressures for OE tires is found on the vehicle certification label, the load and inflation placard and in the vehicle owner's manual.
The U.S. tire manufacturers association (USTMA) says to NEVER use less inflation pressures than what has been recommended by the vehicle manufacturer.
The authority used to install OE tires on RV trailers is FMVSS. They give specific information to trailer manufacturers for the fitment of tires on the trailer and to insure the recommended cold inflation pressures for those tires are appropriate for that fitment. Therefore, the vehicle manufacturers recommendations are minimum recommendations.
Inflating RV trailer tires to the load carried IS NOT an acceptable option. That procedure is used by the trucking industry and is authorized as a standard within their regulations (FMCSA).
The tire industry does not SET
RECOMMENDED COLD INFLATION PRESSURES. That is the sole responsibility of the vehicle manufacturer.
Remember, trailer manufacturers are not required to provide load capacity reserves with their OE tire fitments, unless they deem it appropriate, or they are following recommendations from another organization such as RVIA.