Originally Posted by
genejockey
I have occasionally seen truly amazing deals on tires, only to discover they were 650s.
It is a bit of a self-perpetuating phenomenon, of course - nobody buys bike with 650s because there aren't enough tire choices, the gearing is weird, etc, so nobody bothers to make tires or rational gears because nobody buys bikes with 650s.
Wasn't it Quintana Roo who made all their tri bikes 650?