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I am abandoning this thread. I've just done a top speed in steps study, and the first 8 steps are extremely close ratio steps.
1/1 47 MPH
1/2 56 MPH
2/2 69 MPH
2/3 77 MPH
3/3 88 MPH
3/4 96 MPH
3/5 103 MPH
4/5 115 MPH
4/N 214 MPH
5/N 250 MPH
Not very useful on a street trike.
I thank those who had suggestions.
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