Originally Posted by
evan811
It seems like a comical idea because even if you flip your wheel over to a different size cog, you will have too much or too little chain to run the other side, so whats the point. Or perhaps I am missing something here?
Older frames with long dropouts have plenty of room for 4 or 5 tooth difference. You'll rarely ever want such a spread in real life. Maybe 2 tooth difference.
Formula fixed/fixed hub with 16/18 Surly Dingle and 16T freewheel. Yes, freewheel cog fits nicely on the hub. If you look closely, you can see an old bottom bracket lockring I put on the hub first as a spacer.