These measured 19.5 at the rim brake, inner not measured.

the tire is Specialized 1 1/8” with a center rib for ‘efficient rolling’ that made it squirrely on any turn. Terrible tire.

On a tall (62cm) bike, 27” does not feel quite right, for fast riding.


Came on a ‘71 PX-10, No idea what might have been original to that bike in USA.