Quote:
Originally Posted by SwampYankee
Wouldn't that be determined by the manufacturer? I always assumed that's what they stamped on the sidewall, based on max load capacity. Is that an incorrect assumption?
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The sidewall pressure is MAXIMUM inflation pressure.
I read a long time ago, and I believe it's true, that the car manufacturer designates a pressure for best ride and handling, the tire maker designates a pressure(in their books in the days of the tire stores, not what's stamped on the tire) for best tire wear.
I have learned that occasionally running the cold pressure indicated on the door jamb sticker will lead to uneven wear. Adding 2 PSI to that figure will prevent this.
If you load a truck or trailer to the max, or even a car with a trunk overloaded with moonshine, air the tires to the max pressure stamped on the sidewalls to prevent tire damage from internal overheating.