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Old 05-10-2004, 11:33 PM   #9
Scooby Guru
Member#: 8891
Join Date: Aug 2001
Chapter/Region: International
Location: Houston, TX
2002 WRX Silver
'02 SV650


yep not moisture, just the good ole PV=nRT, nitrogen (a major component of breathable air, ~70%) is more temperature stable than oxygen (IIRC).

Do a few laps, your tires will heat up to operating temp and then adjust pressures. They will stay (or at least stay close) to that pressure when the tires are hot for subsequent laps.
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