>>1831229http://eu.breezerbikes.com/history>When Joe Breeze hand-built the first modern mountain bike in 1977, Breezer became the world’s first mountain bike brand.>Eventually his combined skills led him to create the first all-new mountain bike, in 1977. Until that point, riders were modifying old cruiser frames and components for off-road riding. Joe built the Series I Breezer bikes with the goal of creating a new, stronger and lighter bike that would open up new possibilities for riders.So I was right: they ARE purpose built early mountain bikes.
I haven't yet seen any evidence that straight tube roadster frames were modified as klunkers though. Googling klunkers and repack races all I see is curved tube cruiser frames.
