Lyrebird_Cycles
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- 10/7/16
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i'm equal parts jealous and wtf
looks awful complicated to set up...
The setup shown is very Heath Robinsonesque.
Most untrained people pedal at 60 - 70 RPM. Assuming a chainring around 48 tooth, all you really need is 16 - 18 tooth cog and a chain tensioner. The most convenient type of cog for this sort of thing is a 6 hole ISO mount.