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Old 30 October 2007, 01:28 AM
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Roadsterboy Roadsterboy is offline
Join Date: 13 September 2007
Location: Illinois
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Originally Posted by bear68 View Post
Nascar, the airline industry and NASA all make use of nitrogen in their tires mainly due to the fact that pure nitorgen has a more predictable expansion and contraction rate which is helpful for aircraft and spacecraft which handle extreme temperature and pressure changes due to altitude changes. Nascar uses it since their tires handle massive pressure and temp changes due to the very high speeds they travel.
Formula One and, I believe, Champ Cars also use nitrogen for tires, for exactly the same reason you state. I think the "dryness" helps in this instance as well, as the less moisture in whatever's in the tire (herewith called "air"), the less expansion and increase in pressure (I think. Feel free to correct me if wrong).

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