Help a brother out here:
I converted an old bike to fixed gear a few months ago. I enjoy it, but think I'd like single speed better and feel safer (I simply cannot get the hang of stopping on the damn thing). Fortunately, I have a flip-flop hub so switching shouldn't be much of a problem.
So my question is, what kind of cog should I look for in the back, or is "cog" even the correct part/term? Freewheel? Cassette? None of the above?