Di2 onto retro steel frame.

Re:

...but you'll ruin a classic frame in the process... unless you have something that already has fallen into the hands of the fixie/SS squad...
 
You could do it easily enough, the only difficult part would be getting the rear derailleur cable out of the chainstay. You won't have a hole for that so I'd advise taking the cable out the bottom of the BB shell and routing it where a normal cable would go to the back. Guiding the cables through is easy, they're only short and all meet at the BB.
 
Back
Top