I have a RAM 2500, Run E-rated KO 2's on the highway run 52 lbs as per a chalk test while empty. If I am pulling or fully loaded on Highway it's max at 65psi. Off road I'll start at 25 psi and go from there. I always have Viair in the rig. It's worked for me for years.
With all the armor and camping stuff , I know I am just this side of an up armored Hummer! My wife says " We look like Grapes of Wrath" we are just missing Grannies rocker .
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