Peter Schwar said:
"There was some sort of automatic clutch mechanism in the hub that k icked out of one gear and into another as a certain rmp. A bike that's both fixed gear and not a single speed!"
Wouldn't it be as simple as putting the freewheel cog on the other way around so that the freewheeling is in the other direction, no need for left hand threads for the cog?
Brian Booth
Toronto, Canada