You'll either need an emergency spare (good for limited distance and no more than 50 mph) or one for the front and one for the back. And where you gonna store them and/or the one you took off? If you really need a spare I think I'd advise a trailer to carry it/them.Has anyone purchased a spare for their 718 - I am planning a few road trips this summer - and you never get a flat in front of a tire repair shop that has your specific tire.