Quote:
Originally Posted by Safety3rd
i plan on using the sprocket that comes in the kit of parts ( 12 teeth) and the other gear has 28 teeth
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Now we can do the math:
- The CIM's free speed is 5310 rpm
- The Cimple box steps that down 4.67:1 to 1137 rpm
- Your sprockets step that down 28:12 to 487 rpm
- In order to run the CIM continuous-duty without burning it up, you would want to run it at about maximum efficiency, which is 87.5% of free speed (1/5 horsepower). So 87.5% of 487 is 426 rpm
- 426 rpm is approximately 7 revs/second.
I don't think you normally pedal that fast.