Has anyone out there ever tried mounting a 26 x 1-3/8" S-6 tire (ISO 597 mm) on an old 26 x 1.375" (ISO 599 mm) rim? It looks as though, with only 2 mm difference on the diameter, the tire should fit. However, I can't find anyone who says it will work, either.
Unfortunately, when I rebuilt my 1956 Columbia 3 speed roadster, I didn't recognize the VERY OLD tire designation, and there simply aren't any 26 x 1.375" tires available any more.
Anyone have a suggestion <sheepish grin>