It seems that Michelin must be having a bigger problem with the RV tires than I had originally heard. The problem with availability seems to extend well beyond just the 315s many of us run to their 295s and 275s. On another site it was reported that Spartan had to delay rolling chassis shipments due to the lack of tires. Regardless of the number of tire sizes affected, Michelin, a well respected manufacturer of quality tires, has left their customers stranded. If you need tires, due to scheduled replacement or roadside failure, you need the tires now. With our automobiles we would not generally be too worried about brand X not being available. We would simply move to brand Y. For many of us, individually and as manufacturers, we simply insist on Michelin for our motorhomes.
Most manufacturers of almost anything don't take the risk of a single source supply chain. Even if we have a prefered supplier, we always have a secondary supplier; a supplier that always gets a piece of the business. Hopefully this is wake-up call to Prevost, Newell, Spartan and Freightliner that they should have two tire suppliers, if they don't already. With the possible exception of 365s, there are competing tires to Michelin's RV series of tires. I prefer Michelin for everything I have, but I won't be held hostage to non availability.