On your way that 40 miles, it sounds reasonable to me to run 80 psi cold in the front & 70 psi cold in the rear & after weighing on your way back I'd run 80 psi cold in the front & 70 psi cold in the rear, then once you burn the Seafoam & dump the black water I'd run 80 psi cold in the front & 70 psi cold in the rear.
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Fulltimed 10+ years
Sold '13 Thor Redwood 36 FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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