Originally Posted by
Iride01
Seems like a post hoc explanation more than what is really happening. If the “C” refers to “crochet” or hooked bead tires, then why does Continental list hookless tires as “700x32C”
here? And why do they on the same page under the tab “27.5” list the tires as “
650 X 32B”? Last time I checked “B” isn’t an abbreviation for “crochet”. I also can’t seem to find any SI unit that uses “B” as a distance measurement. A 650C rim, by the way, is very different from a 650C using a “C”. The letter designation is in reference to the old French system and has nothing to do with a metric measurement.
The linked article is handwaving at best.