We have the Goodyear Endurance tires which came on our Pinnacle now but really want to go to a G rated tire.
Good idea.
Looking at Jayco website shows the '22 Pinnacle 36 FBTS same trailer you have now has 17.5" H load range tires.
What was Jayco thinking when they selected a load range E 80 psi tire for a big 16500 lb trailer. Especially a Endurance with those thin 8/32" of tread depth.
The Transeagle ST load G are another all steel ply carcass commercial grade tire. These plus several other brands of all steel ply commercial grade ST tires are made in china but beat any made in the USA tires for reliability in this class.
Now load C/D/E poly carcass ST tires aren't in the same class so they don't compare well at all.
As long as your present wheels are rated for 110 psi and 4400 lbs IMO its a good move considering your present tires.