Who makes the G rated tires that came on your rig. If they're Goodyear 614's they're made in the USA and you're good to go. You might also want to google where are Cooper trailer tires made. Articles with statements like this will come up: Cooper Tires has been around for many years and still most of their tires are produced in America. While they are obviously concerned with other growing markets, the only tires that are imported to America are their trailer tires and economy passenger tires.
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
2017 3500 Dodge Maxi DRW 4X4, Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, etc.