Switchback triple tree
 

I can't seem to find a clear cut answer to to this ... But does anyone know if the switchback triple trees can be used on a 2012 street bob? I like the nacelle headlamp on the switchback. I'm assuming I would either have to get a wider wheel or a spacer to fill the gap on the wheel. Does the headlamp nacelle just mount onto the triples?

I would say not without changing the forks too. The Switchback uses the larger FL forks not the FX like the ret of the dyma family. Might be easy to try to mod the headlight cover if that is all you want.