Originally Posted by
Blue Belly
I'm sure race regulations have a lot to do with it. The 650 fad had its day & probably proved itself as an insufficient money maker. Maybe I'm wrong? Those are the two that jump out at me.
It was a pretty well known fact that 650 wheels just didn't sell on road bikes. Several manufacturers had 650 wheel frames and no one wanted them. I'm not even sure if race restrictions even came into play back then. Schwinn and at least one of manufacturer made the same frames in both sizes and they hardly sold any 650s.