Originally Posted by
mander
Yeah I'd be sorely tempted to throw a DA barcon on it in friction mode.
It requires an indexed shifter and the correct amount of cable pull. Neither a friction or 8 speed index derailer shifter will work. The Nexus 7 speed hub had a thumb shifter, the the 8 speed is a better hub.
Here's how the new SA 3 speed fits my Carlton with 120mm spacing. There enough excess axle that you could space it out to at least 126mm, maybe even 130mm. The chainline is going to be dead on.