i tried to do a little on-line research on this, even checking out sheldon brown's defintion, but i'm still a little unclear on this.
i know that just because i throw some moustache bars or chopped and flipped cruiser bars on a bike doesn't mean i get to run around calling it a scorcher, so what is it? tire size? brakes (or lack of, depending on whose definition you go with)? geometry? a brooks saddle?
and please, if you can, try not to reference the wright brothers in your answer. thank you.