I think it has to do with tubulars, too; both Challenge and Vittoria tubulars use 28 x ___mm but on their clinchers they read 700c x ___mm. Have to admit for a half-second I was concerned I'd bought the wrong sized tire (I did this before at a swap meet where I bought a pair of NOS tubulars which were for those weird-sized triathlon wheels back in the 90s).

Tape is supposed to arrive by Saturday; the tires shipped fast so who knows, maybe I can take a quick spin on Sunday if the weather cooperates.

DD