Thread: 45PSI Tires MPG vs. 34PSI Tires MPG
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Old 07-19-2008, 06:40 PM
sfACTOR1 sfACTOR1 is offline
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Quote:
Originally Posted by mahout View Post
The coefficient of expansion of nitrogen is less than that of oxygen so the pressure increase is less.
Its only significance is in racing where heat buildup is extreme (on the order of a hundred degrees or more) and critical to the tire not overpressurizing, losing valuable contact surface.
I've forgotten what the optimum tire temps for GY race tires but it seems that it was around 220 degrees F.
Using nitrogen on the street isn't much of a help in mpg.
I believe the lack of H2O VAPOR is much more significant than the lack of OXYGEN in pure N2 filled tires
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