I was going to purchase a fixed gear bike from a friend and convert it to a 7 speed with the Shimano Nexus hub for a commuter. The Nexus hub requires horizontal dropouts but would you consider a fixed gear bike's as a true "horizontal dropout? Is it too horizontal? Is this conversion possible or should I forget it?
Blasphemy I tell you! Blasphemy! Why ruin a good fixed gear frame and put gears on it, even with an internal hub? Problems you will run into is that there are probably no cable bosses so you will have to find some solution for that. I'd just get an old crappy tenspeed from a tag sale and convert that.
I just noticed this thread. I have a "track bike" that I shoehorned a SRAM S7 IGH into. You need a steel frame so you can spread the rear triangle. (you can't spread aluminum) You'll also need a new BB to get a good chainline. If you have any specific questions feel free to ask.
