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Old 11-14-14 | 08:24 PM
  #59  
Daniel4
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Joined: Jul 2013
Posts: 3,498
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From: Toronto

Bikes: Sekine 1979 ten speed racer

Originally Posted by Sullalto
48/14 at 80 rpm is just under 20mph, 24 mph at 100 rpm...how fast are you going?



That's 100" traveled per pedal revolution, not mph or whatever.
Alright, I crunched some numbers from first principles.
At 52:14 gear ratio, one revolution on my peddle is 3.714 revolutions on the rear wheel. For a 27in wheel, that's 100.28inches of travel which is 2.547metres.

Logs from the Toronto Cycling App shows that my average speed range from 12km/hr to 16km/hr. So my peddling ranges from 78rpm to 104rpm. Close to the estimate I did at my desk at 84rpm.

Last edited by Daniel4; 11-14-14 at 08:31 PM.
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