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Old 01-22-19, 01:03 PM
  #78  
DiabloScott
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The purpose of VAM is to estimate how fast a rider will climb an unknown hill, based on information from a well-known hill.
So pro riders can tell how much time they'll gain or lose over a competitor on a climb for instance.
And it's not valid for climbs less than 6% or so, because it assumes essentially all the power is going into elevation rather than wind and rolling resistance.
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