Interesting bonus idea:
Get a BMX hub like this Halo MXR.
Space it out to 120mm. Go to velosolo, get a bolt on cog for the disc side, and as many of those 9-speed compatible single speed cogs on the freewheel side.
You might end up with a single flip flop wheel. fixed on one side and 3-4 gears on the other side?
Run that with a cheap 9-speed derailleur with the problem solvers derailleur hanger and a clamp-on friction shifter.
Interesting bonus idea:
Get a BMX hub like this Halo MXR.
Space it out to 120mm. Go to velosolo, get a bolt on cog for the disc side, and as many of those 9-speed compatible single speed cogs on the freewheel side.
You might end up with a single flip flop wheel. fixed on one side and 3-4 gears on the other side?
Run that with a cheap 9-speed derailleur with the problem solvers derailleur hanger and a clamp-on friction shifter.
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