First "documentation" link yields these little gems:
Fact or Fiction? Tire contact patch and air pressure.
Quote:
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The tire diameters are within 1.6% of each other. The rear is 28.5% wider than the front. Now, don't get excited, we're not going to look at grip or tire force curves here, so we don't need to even try to talk about tire compounds. One point Camp A argues is that the wider tires have better cooling, so a wider tire typically is made of a softer compound and that's the reason it gets more grip. I.e., it's not because they have a bigger contact patch. Fine. But if the contact patch is not really the same size (within a reasonable tolerance of course) than the argument is based on something bogus (even if the wider tires DO have softer or better gripping compound. I've never built a tire or talked with a tire engineer so can't be 100% certain.)
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It's a guy who downloaded some tire pressure/load/patch pressure/patch size charts from a tire website. He only compares patch size to load and pressure and does not deal with traction or safety.
But really this page is really addressing the original autospeed article right? I already said that that part of the article (the one about different widths of tire) was not important to this discussion as we want the narrowest tires for better efficiency. And The title of the article is an overstatement.
"documentation" #2 is an news article about the rollover tendency and tire blow out issues of the infamous Ford explorer.
Worldandnation: Rollover fear tied to tire warning
Quote:
Ford spokesman Mike Vaughn said Sunday that he could not confirm information in the Ford document, which was distributed to reporters by a Little Rock, Ark., lawyer who is suing Ford and Bridgestone/Firestone, but he said tire pressure is not the issue.
"Yes, increasing the tire pressure does increase the ride characteristics," Vaughn said. "Higher pressure will give you a harsher ride. But the issue is this particular tire. The recalled tires are the ones that show the higher failure rate. It is not an issue with the air pressure or with other tires."
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So, you were saying...
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