Quote:
Originally Posted by CargoBoatTails
The recommended tire pressures on the Vehicle Certification Label in the door are simply so that tires wear evenly. Over inflated tires will wear the center faster and underinflated will wear the shoulders faster. The ideal choice is to use the smallest possible tire(max load=GAWR/2) with the highest tire pressure so they wear evenly. A good example of this was on the poorly engineered Audi Cabriolet S Lines which weighed a few pounds shy of 2 tons and recommended 46 psi in 40 series tires.
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About 120,000 miles of tires at 45 PSI and not any uneven wear, on several different tires and cars-trucks running higher pressures for a decade. In fact based on my experience the tires will last longer, as well as the brakes and most other vehicle parts from hypermiling.
regards
Mech