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Old 03-06-06 | 09:05 AM
  #23  
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Eggplant Jeff
45 miles/week
 
Joined: Mar 2005
Posts: 2,020
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From: Philadelphia, PA

Bikes: Jamis Aurora

Originally Posted by vrkelley
I'd like to use your formula on our local hills. Please post your magic.
Remember, GRADE is not the same as ANGLE. A 90-degree angle would be perfectly vertical (think side-of-a-building vertical). A 90% grade is 900 feet rise over 1000 feet run, or more like a 42 degree angle.
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