it's marked with a 18.5 and has an x 622 too.
the rim must match the tire, so the markings could be referring to the tire's dimensions or a rim that the tire fits. i'd put my money on the inflated tire's dimensions. although incredibly narrow for a modern tire designed for anything but a track sprinter.
in any case, it's unlikely that the 18.5 and the 622 refer to two different objects though.
like i said previously, you need a Rosetta Stone, maybe a crystal ball too.
Last edited by hueyhoolihan; 06-07-15 at 08:14 PM.