Tireman tends to give the best advice. Trust him.
Sticker tire pressures are optimum for the tires specified on the sticker and the RV as shipped from the factory. Different wheels and tires may work well with the recommended pressures. I don't know. The tire manufacture probably knows and may provide a table you can use to optimize for your loading. It is worth checking their website or calling a tire dealer that carries that brand.
Tirerack.com or other tire websites have experts who may be able to provide optimum pressure for your specific loading.
https://www.tirerack.com/tires/revie...surveyComments
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