Originally Posted by
Marcus_Ti
They totally got one thing wrong. He admits he got all that info by osmosis, and not by research.
But just to clear that one thing up: The 700D size was never part of the French scheme. It was a made-up size that GT invented for their hybrids, supposedly to avoid some kind of import duties.
AFAIK nobody else ever used it.
And even the French wouldn't do something as irrational as making a 700-series rim diameter that is smaller than the biggest two 650-series rims.
As far as the 26 x 2.125"/559mm/22" rim size, that was referred to by the French as "650 Ballon," not 650D. There were no D sizes in the French scheme.