Rambler, there are only 2 true tires made for RV applications : Michelin XRV and Goodyear 670. These tires are made of soft rubber due to all the sitting that a RV does. The rubber on these tires are treated to withstand UV Rays from the sun, which destroys tire life. You will want to get the strongest sidewall rating possible. Michelin XZE are hard rubber truck tires! I ran XZE's on my Semi for 25 years before I retired. If your tire budget is price sensitive you may opt to go with a cheaper tire. As others suggestive you can join FMCA and they offer a Michelin Fleet Tire Program where you can buy Michelin Tires at a discount. Good Luck in your tire search.