Originally Posted by CWSWine
I was the Goodyear Marathons but was told by Goodyear customer support those are made for Pop Ups and Travel Trailers and not for 5th wheels.
Goodyear Customer Support recommended G614x85R16.
Here is what Goodyear Customer service sent a link to about the Marathon tires are "Trailer and Pop Tires" and the G614 RST are for 5ers. See page 4.
Scroll down to page 18 of your pdf. It shows Marathons are also for 5th wheels. Especially if you don't have 16 inch wheels, since the G614 only comes in a 16.
My old 5er had 15 inch wheels. It had a GVWR of 12000 lbs. I did run Marathons on it until Marathons went down hill (about 5 or 6 years ago). Ran whatever load range E trailer I could find after that. E's used to be hard to find in a 15 inch.
The new trailer is definitely a candidate for the G614... or bigger.