"Those are replacement wheels from Vuelta. They only take a fixed cog on both sides. The original wheel set had a flip flop that took a freewheel on one side and fixed on the the other. I taco'd the front wheel in a gigantic pothole and the rear…"
"love it. can't tell...is it a flip flop hub ? a friend of mine got a rush hour in 2006 that so inspired me I promptly converted an old miyata (112) to SS (marcus from yojimbo's built the rear wheel) and now I own another SS…"