I bought the unit from Saf T Corp but they had a lot of problems delivering and are no longer doing RV business (just truck fleets). I learned on the most recent trip to set the tire pressure at about 15% above the cold pressure recommended for the tire, 80 psi in my case. My wife has a contact in the trucking tire industry and it seems tires are safe up to about 150 degrees, so that is where I am setting it. So far tires have not gotten above around 80 degrees.
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