I would suggest getting your tire pressure up to at least 10 psi from max inflation. For example, on an E-rated tire, 70 psi is a good recommended pressure to get maximum tread life and fuel mileage. Avoid following the manufacturer's pressures listed on the build decal in the door jamb of your truck. They are placed there for the best "ride" and usually are much too low to provide good tire wear or fuel economy. To those that cannot tolerate a stiff ride, then you WILL have to sacrifice tread life and fuel economy for that better ride. The problem with lower pressures is that the tire will generate more and more heat as tire pressure decreases. It is not a real commonly mentioned aspect of the tire industry but as far as tires go, more heat = more wear. One directly affects the other. The lower the pressure, the more heat generated per mile. I've seen 70,000 mile rated tires wear out in 8,000 miles and in a span of 7 days. Why?? Because the tires were being tested non-stop, 24/7 at a test track and the intense heat generated by the long-term driving absolutely destroyed the integrity of the rubber compounds leading to maximum tire wear. They did this repeatedly with every make and model of tire in the book, including Michelins which usually win in the mileage category. So, longer tire wear is a function of correct air pressure (as I stated above) + regular rotation intervals. If tires are not rotated, subtract around 15,000 miles from the overall life of a tire, regardless of brand. Keeping air up and constant can net good wear and better fuel mileage in the long run. Hope this helps.
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