Just QQ for anyone who had bad luck to use collapsible spare; once puncure happen what did you do with real wheel? It is too big to fit into place after spare; to big diameter to fit into place (especially if you have trunk organizer like on pictures in this thread) and also to high to let the floor to be closed. I fit is just during way to back from work, maybe this will work. But lets imagine you're traveling with your whole family for skiing in the winter mud...