Originally Posted by
nfmisso
More to the point; why isn't everyone using ETRTO designations? In automobiles, trucks, motor vehicles - just about everywhere else, tires are designated by the bead seat diameter (BSD). It would a great deal less confusing for everyone if bicycling followed the same standard.
Yes, I also prefer ETRTO designations. Especially when I order something online.
349, 559, 584 and 622 mm will do it for me.
But 650B looks amd sounds better and is easier to remember than 584 mm. And that's probably why it lives on.