That 5vr has a DRY weight of 12,725# ----2 axles with 285/80R 16 'E' tires (unknown brand)
Tires could be 3-4 yrs old...depends on when RV was mfg. Early 2014----late 2014
So crawl under and look at date code ---it will be on backside
Were tires covered?
Are they sitting on dirt, gravel, grass, concrete...sitting in water?
Was air pressure maintained or last time check was 2014?
Appearance of tires...cracks, dirty or clean?
WHO did the 'professional inspection....tire removed and broken down or some tire jock looked and said OK?
I would take my air compressor, pump them up to max sidewall psi and give it a go provided it had a spare that held air.
10 hour trip......hold speed down, stop after and 1 hour of drive time and check tires along with hubs/drums for temps
Best to use an infrared thermometer but one can use back on hand to judge.
Look for one that is hotter then rest....tire and hubs
Brakes/bearings could be issue also after just sitting for 3 yrs +
Good luck!
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31