I'll support half of c92vette's recommendation
. I'm one who doesn't believe in paying the premium prices for either Goodyear or Michelin as top-tier manufacturers have to pass along their advertising costs to the consumer.
However, Toyo is an excellent choice for RV tires, IMO. It's a quality product at substantially lower prices than Michelin or Goodyear. Toyo has an excellent reputation among truckers and RVers alike.
Another advantage is that the Toyo warranty is better than Goodyear's. Toyo has full replacement through 5.5 years as long as the tread is within the first 2/32nds. Goodyear is full replacement within the first year and after the first year, you'll receive a prorated adjustment. Toyo's isn't prorated unless the tread is worn over the first 2/32nds which RVs usually will never exceed ...truckers will but most RVers do not put that kind of mileage on a tire. Plus, I've talked with a few who have found it difficult to deal with Goodyear over a warranty claim.
Toyo warranty information
I know it's not answering your question but I'd recommend the Toyo M143. You'll save a lot over the Goodyear product that your dealer is trying to sell you and you'll get just as good a tire.
Detailed description of Toyo M143