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I see the consensus is to inflate tires to the maximum rating for a particular tire, ex 80psi. I have always been reluctant to "max" out anything so have been running my tires on truck and rig at 75psi, the max rating for both being 80. I get the impression it makes almost no difference between 75 and 80 psi, other than perhaps a little stiffer ride at 80? I pretty much only run 60-65mph on the highways when hauling our rig. I am the tortoise and get passed by everyone
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