Old 12-18-09 | 04:33 AM
  #26  
wmodavis
Bill
 
Joined: May 2007
Posts: 630
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From: HIGHLANDS RANCH, CO

Bikes: Specialized Globe Sport, Specialized Stumpjumper FSR Pro

There is a clear consensus that CO2 causes Mann made tire warming.
I usually use a 70% mixture of nitrogen and whatever else is in the atmosphere.
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