Thread: Map My Doom
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Old 02-23-09 | 09:39 PM
  #48  
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patentcad
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Map My Ride is giving you AVERAGE grade. The AVERAGE grade of Mt. Doom is 6%. The steepest sections are 15-18%, one stretch like that is 300 meters long. So if the average grade of a hill is 12% (that's an extreme average grade for a climb) the steep sections might well be 20%+.
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