We went with the Goodyear G614 and have been very pleased with them.[emoticon] The Goodyear G614 are made in the USA.
http://www.goodyearrvtires.com/pdfs/tire-care-guide.pdfYou need to make sure your rims will handle 110 psi. It will be stamped on the back side of the rim.
We should have done this before the Marathon blow out happen [emoticon]
It was more like an explosion. It blew parts across 3 lanes of traffic on the interstate.
Goodyear did pay for the damage and gave use credit for all 5 Marathon tires toward the new G614 tires.
Goggle search: "China bomb marathon tires"