--Years ago I posted this:http://www.bikeforums.net/showthread...ight=77Univega and asked:
"Has anyone had success with adding a front derailleur onto a 3-speed bicycle with a rear in-hub shifter (like a Sturmey Archer) thus creating a transmission with six usable gears? "
(Yes, it would have to have a chain tensioner.)
Well, I have successfully converted a Windsor Oxford 3-speed to six speeds by adding a granny chainring, front derailleur and chain tensioner. The local terrain here is mostly low hills with an occasional steep one.
Also, I hired a local bike mechanic to locate the seat back for my flat-footed comfort.
I did it just to do it.
Enclosed are pictures, I will answer questions.