Anyone carry a "temporary use spare" in their car?

Also wouldnt do me any good, my front tires are 26” dia and my rear tires are 28” dia lol.
let's assume you got a rear flat and you have a locking dif. you could, one at a time, move the fronts to the rear and put the spare on the front with one of the rears. it would sit funny and drive crappy but it would get you home or to a tire store