Howabout a spare tire?
With a bolt-on wheels, you can use a GM-pattern wheel with a standard (small) tire. With pin-drive wheels, we offer a special narrow wheel that mounts the smaller tire. Remember, though – use of different diameters of tires on a limited-slip rear-end is only very temporary! Most people, in order to maintain the full trunk space, will simply carry a couple of cans of Fix-a-Flat and a cell phone.