I myself wanted a real tire that you could actually drive on if necessary. Found a C195/70R-15 Goodyear "Cargo" tire that fits in the spare tire well pretty nicely (although sticks up a little more than I'd like). It's 25.7" diameter, matching my 225/60R15 tires perfectly. Put that on a 15"x6" x 4.5"BC standard "Ford" wheel.
