Airstream classic 2006 Owner's Manual page 40

EXTERIOR
Recommended Tire Inflation Pressure
Recommended Inflation Pressure is the recommended inflation pressure. The
recommended inflation pressure is not to be confused with the maximum inflation
pressure that is shown on the side of the tire. At the recommended inflation pressure,
tires will last longer and be less likely to fail, and the car will use less fuel. Serious injury
can result from tire failure because of under inflation or overloading
D
Cold Tire inflation Pressure is the tire pressure checked in the morning before you
drive more than a few miles or before rising ambient temperatures or the sun's radiant
heat affects it. Check your tires' air pressures at least once a month, before each trip
and each morning you drive during a trip. Tire pressure should be checked cold, as
tire pressure ratings have been designed with typical running heat/pressure build-up in
mind. Make sure the valves and caps are free of dirt and moisture.
Recommended Cold Tire Inflation Pressure
ST 225/75R-15 65 PSI
D - 8