No spare tire for me either. But all 4 of my tires are filled with green slime. This stuff will instantly repair a hole up to a 1/4" diameter. If for some reason this fails I keep a plug kit under my back seat. And I am in the process of shopping for an on board compressor to mount in the engine compartment to air up my tires in emergencies or when I get off the beach fishing. Oh yeh,got onstar for another 10 months and will renew after that.