Since I got my new wheels and tires, I've been thinking about putting my best 265/75/16 in the bed for a spare, just wondered if it would be close enough in size to a 32x11.5x15 to use if I had to? The 265 will be mounted on a stock explorer teardrop wheel.

 

the 265/75 is like 30.8 inches. Its somewhat close and better than nothing but personally i'd get a correct sized one.