Old 05-29-08 | 08:59 PM
  #119  
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cooker
Prefers Cicero
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Joined: Jul 2005
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From: Toronto

Bikes: 1984 Trek 520; 2007 Bike Friday NWT; misc others

Originally Posted by charles vail
I've spun a 65 inch gear up to around 25 mph with no attachment and while I don't know my pedal cadence,
65 gear inch means you pedal like a person on a penny farthing bicycle with a 65 inch front wheel, which gives you 65 X π =204.2” of travel per pedal rotation.

25 mph = 0.416666 miles per minute = 2200 feet per minute = 26400 inches per min.

That’s 26400/204.2= 129 rpm.

Someone check my math
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