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Old 08-17-2010, 06:51 PM   #1 (permalink)
eco30BMW
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Join Date: Oct 2009
Location: Lexington, KY
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Heidi - '85 BMW 325e M20B27
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Incorrect Information re: Tire Pressure in Efficiency Mods

I'd asked the webmaster twice to take down this misleading information from the "65+ efficiency mods" section of the site and nothing has been done...

Quote:
Increase tire pressure to max sidewall

Reduces rolling resistance which decreases the amount of power your car needs to move. It also increase steering response, increases wet traction, and decreases tire wear.
Increased tire pressure DOES NOT help wet traction, as a matter of fact it harms it. The fact is that you are increasing tire pressure to decrease your contact patch to decrease friction. Decreased friction equals less traction all around and would be particularly noticeable in the wet.

Your information is misleading and since the site also encourages people to maintain as much momentum as possible through turns, this can be dangerous to boot, making people think they have more grip than they really do.

Also, increased pressure will make the center of the tire wear faster, since this area is put in increased contact with the road. The center of most all-weather tires is critical in pumping water out from under the wheels and decreasing the tendency to hydroplane.

Please correct this. The information on this site should be based on science, not counterintuitive and fantastic claims.

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