"However the fact that Jayco discovered their mistake in selecting a load E tire on 7k or 8k axles?? for this size trailer and now covering their mistake by going to a 17.5" load G commercial grade all steel carcass makes a much better tire selection."
Please tell us what "E" rated tire Jayco replaced to run the "G" ?
I am betting NOT the ENDURANCE as there have simply been no non road hazard failures.
Plenty or RV's are now using the ENDURANCE from the Factory.
If running Chinese tires sure you may want to run with a big reduction in what the charts say but quality tires can be ran at any pressure up to their MAX.
If I were running commercial trailers I would run something substantial like this. I am sure you would approve. This is my new tires and wheels for my 24k DRV.