http://nubikemfg.com/ Apparently this is the first major improvement in biek concept in over 100 years!
Well that look massively inefficient. What about the 'upstroke' you get on a conventional round chainset?
What about the 'upstroke'
Nobody actually pulls on the up stroke beyond about 40rpm, but treadle cycles are perfectly capable of turning upward pedal force into crank torque.
@jeff80 started
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http://nubikemfg.com/
Apparently this is the first major improvement in biek concept in over 100 years!