Thor Forums

[Travelin' Texans]

IMHO & the method I used, right or wrong, on 1 ton dually tow vehicle & 16.5k lb 5th wheel was to run all the tires at or very near, no more than 5 lbs less, the max load rating printed on the sidewall, never had rv or truck tire issues & all 10 tires wore evenly.
Running at lower pressures increase temperatures & for every psi below that max inflation you also decrease the load carrying capacity on the tires.
Motorhomes are built on truck chassis in order to carry heavy loads so a stiffer ride is to be expected, if you want a cushy ride get a luxury car.
Again in my opinion, worth .02 cents or less, weighing RVs then adjusting each tire for the load on each tire is a waste of time. Every time you add/remove weight you need to reweigh & readjust tire inflations on each tire??? What a PITA!
If the max psi is 80 then running at 76 & 78 should be fine & would be my recommendation for that .02 cents.
If inflated to the max it's not necessary adjust inflation to account for increased pressures due to increased temperatures, the tire manufacturers have taken that into consideration when manufacturing.