How far you would get and how your insurance company would react to the fitment of a non-standard space saver tire in the event of an accident would also be worth noting, certainly given there is no correct standard fitment, and the Sporty weighs several hundred pounds more than most vehicles that use spacesavers (overloading the spacesaver tire???). Could be VERY expensive if you cause death or injury to anyone, because there will be no insurance company that would go anywhere near you.

Is there any REAL reason for doing this???? Seems pointless to save a few pounds, and I doubt whether it will fit under a shorty anyway. The longbody version has the spare inside and can barely take a 225/70R15. Good luck on finding and fitting a spacesaver tire with the same diameter as stock (and YES they do have to be the same rolling diameter as standard due to steering issues if fitted to the front, and overheating of the rear diff if fitted to the rear.

All in all, a really bad, flawed idea.