We carry an unmounted spare for our Phaeton motorhome. It's 22.5 and 39 inches across. When we changed toads, we made sure it would fit in the back end. We had one flat tire on the road and didn't have a spare. The services will **** you on a replacement. We were brought a used tire with a repaired sidewall for over $300. Had trouble holding air, but we drove it 20 miles to dealer in Florida and replaced it with an exact match, which the road service said was obsolete. Decided then we would carry a spare. Haven't needed it, but never say never.
Dale
