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With such an imperious opening, I expected a great set of data, which would have been welcome and fun.
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Hardly. Do your own research.
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There is no data in these links and they're hardly relevant to this thread on tire wear. One link is a profile of "Larry" and another is about HIGH speed driving and psi--not wear--while a third is an industry association site's generic main page and the fourth is a goofy and ancient site called "tire world information" that offers no data.
No there, there, despite the dramatic flourish.
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Should have dug deeper.....
I spoke with Marvin Bozarth, Senior Technical Consultant for TIA, and he agreed with my assessment. Of course he only has over fifty years experience. In particular, while he minimized the tire wear pattern found in overinflation since the advent of radials, he made clear that vibration was a predominant problem with overinflation. It is not something that most people will ever notice because they associate part failure with the part and not the real cause from the abuse of vibration damage. The whole car wears a great deal more with overinflation rather than sticking with factory specs. The high cost of that damage to the car must certainly out-weigh any supposed savings in fuel.
He also said that he has seen very little difference in fuel economy when overinflating. While some may overinflate by 2 or 3 or 4 pounds for heavier loads, wet pavement issues and impact damages become significant.
Now, go do your own homework.
And remember, while trying to save a few bucks on fuel may be admirable, the real fundamental issue is that cars must be designed from the ground up for the purpose desired, as I implied before.