I have been thinking this whole thing thru. If you recall the old external JEEP CJ7 tire mounted on the back. I was thinking, since the tires are so small, probably could get a special rack made to mount on the back somehow, if you don't have that damn bike rack. Heck, seems like the smart guys could of even used the colapsable tire with air can like the one style of camero had. Took up no room in the trunk, but when you needed it, it was available. They should make something like that. I might just say heck with the extra warranty on tires. Waste of money.