We are in a conundrum with our coach. Michelin is the only manufacturer of the XZA 365/70R/22.5 for the steer and tag. We have Michelin 315's for the drive axle which are easier to get.
I plan on getting new tires at the end of next year as our tires will be at 6 yrs. old. I'm going to keep a 365 unmounted just in case.
I have a new car that has 'run flats'. We have construction going on in our neighborhood where I think I picked up a big fat screw. :M I took the car to America's Tire where they repaired it. I was out of town for a while and came back home to a flat tire.
I found out I don't have a spare. I could see where the repair failed as air was coming out of the tire at a fast pace. Inside the tire is this thick rubber material which is supposed to slow down a leak or rupture. That thick rubbery stuff was coming out of the failed repair.
Since I didn't have a spare, I found a screw and screwed it back into the tire. I aired the tire up so that I could get back to the dealership for a new tire (I didn't want to deal with a tow or AAA). It worked, it held air just fine. The head guy at the dealer said that run-flats should not be repaired, replaced only. I had just 2,900 miles on that tire!
Anyway, since the coach tires are rare as hens teeth, keeping an extra will be an advantage just in case I need it.
Safe travels,
MM.