Mods feel free to move this where ever it belongs.
Like most RVrs Tires on a single rear tire truck is always an issue or at least in the the back of your mind, I wonder if it has to do with the nearly 3000 pound pin weight.LOL Anyways I have found some tires that greatly reduces the stress.
Toyo AT 3s the tread looks like they will howl but they don't, mine in particular are 20 inch. "which is hard enough already to find anything decent' at 80 psi have a load capacity of 4100 pounds these are F load numbers but are E rated.
The generals I had were 3000 pounds capacity, these are 35 inch dia oppose to the 32 inch I had before I have 2000 miles on them 1000 towing and 1000 with no load I get 1 mile a gallon more when towing and 2 miles more with no load with 4.10 gears. I will take all the help I can get, The speedo shows 5 mph slower than the gps waze ect, I will have it recalibrated next service.
I have the 295/65 r20s they have a lot of sizes in all rim diameters.
https://www.tirerack.com/tires/Spec....III&isSEO=true
https://www.toyotires.com/product/open-country-at2/
They are AT3 now