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Old 21 December 2007, 09:20 PM
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Wolf333 Wolf333 is offline
Join Date: 12 August 2006
Location: Oxford, OH
Posts: 3,206

Nitrogen is used in aircraft tires because it does not expand or contract to the same extent as common air. Until we began using nitrogen, there was a waiting period before tire pressure checks could be accomplished (4 hours) due to the tires still being heated from the landing, which would cause the tire to seem over-inflated (or under-inflated tires would read normal). Also, in very cold conditions, tires could easily be over-inflated.

With nitrogen, the tire pressure will remain within 1 or 2 psi within a very wide temperature range.
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