"Finished" my first singlespeed/fixie flipflop yesterday. Here's two pictures I took during the first trip.





And the way I bought it:



Ambrosio rim in the back laced on an old but new track hub with a Shimano freewheel and a fixed cog. Fir SC350 rim up front around an older Dura Ace hub. Pretty much everything else has been modified in one way or another, or replaced.