Quote:
Originally Posted by KenG
Nitrogen will make no measurable difference. Air is about 80% nitrogen already. The properties of nitrogen vs. air are very similar for normal situations. Racing cars use nitrogen to get a slightly more uniform pressure at the very high temperatures experienced at high speed but street cars don't see those temperatures.
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Right. The reason for "dry" nitrogen in racing tires is that the residual water in the atmospheric air can dramatically raise the pressure if it turns to steam. Optimal racing tire temp is above 200F. Street tires don't get nearly that hot, even cruising in the desert.