Originally Posted by batcat
Does anyone know the diameter of the spare tire Escape uses? I want to buy a custom spare cover for our 21.
The spare should be the same as the tires that are on the axles. A 21' uses the same tire as most recent Escapes, which is a ST205/75R15; although as I recall some trailers have come with different sizes, I don't think the 21' has had other sizes. It's easy enough to read the side of the tire and see what it is, anyway.
I agree that for cover clearance you need to know the overall diameter. The easiest source of this information is published specs, and I find TireRack.com the easiest source of specs. Overall diameter doesn't vary much by brand (within the same size designation), and a Goodyear Marathon ST205/75R15
has an overall diameter of 27.1"... just as Baglo measured.
A cover has a width limit as well, and the "205" is the nominal section width of the tire in millimetres. That's about 8 inches, as the specs show.
I would assume that a smaller tire is unlikely to be used on the trailer in the future, but it might be good to be able to accommodate a slightly larger tire just in case. The next common ST tire size up is ST225/75R15 (28.3" overall diameter).