A question from the owner of an Airstream. My answer would apply to other brands TV and TT.
"After driving my new trailer home from
the dealer, a 316 mile drive, I was alarmed at how badly things got
shaken up. I noticed that Airstream recommends one pressure for all
models and all loads. So I got on the Airstream forum, contacted Airstream, and
contacted Goodyear. Airstream offered no logic for there 80 psi
recommendation even though I penetrated fairly deep into the
organization. 80 psi is on the placard and that's our answer. Goodyear
referred me to the chart we all know but also discussed my concerns for
the ride and my expected travels with my trailer. We concluded 40psi.
I tow my trailer with a Mercedes GLE450. I have a 600 lb. equalizer hitch.
I follow Mercedes tire inflation recommendations. Going from 36 PSI front and back for normal load to 39 front and 50 back at full load. I ran the rig fully loaded over a CAT scale and for the life of me can't find the numbers but I was very pleased with the numbers. I was 150 lbs under max payload for the car and well under the GVWR for the trailer of 6000. The equalizer put all the weight back on the front wheels confirming my wheel well to ground measurements
I have now put 11,000 miles on the rig since march. I compared tread depth using an improvised depth gauge. I can not detect any difference across the tread, from RF side to LF side or front tires vs back. However I can not claim great resolution.
I'm happy with the wear on the tires. I'm thrilled that things remain in place even when driving unmaintained roads. So take that for what it is worth.
I do have a question for the group. The Rear tires of my Mercedes are very close to the wear bars while the front tires show very little wear. I'm disappointed that the dealer did not catch this during the "A" and 'B" services. Rotating or even inspecting the tires is not included in either service schedules. The car has 33,000 and was purchase in March.