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Old 07-08-09, 09:59 AM
  #7  
DieselDan
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Join Date: Mar 2003
Location: Beaufort, South Carolina, USA and surrounding islands.
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Bikes: Cannondale R500, Motobecane Messenger

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The vents on an MTB helmet are designed to cool at a more upright riding position and slower speed. The vents are a road helmet work best at a road riding position. This is assuming quality bike shop equipment.
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