As mentioned in the first post, the RV weighing folks include a 5 lb. "fudge factor" in their pressure recommendation. That means that the 1 lb. pressure drop also mentioned will probably not be an issue. For us, the pressures recommended was the door sticker pressure on our truck and 110 on the Big Sky. We asked about running the truck at the tire sidewall pressure. They said that it wasn't a problem per se. At the lesser pressure the ride and tire wear would be best. At the higher pressure fuel mileage would be better, but the ride would be rougher and tire wear might be uneven.
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