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Old Mon, May-10-2010, 08:12:25 AM   #9
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Join Date: Mar 2009
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Location: Castro Valley, CA

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Contact Patch:

Now we need to clear up a huge misconception. Here goes:
A 225/45/18 and a 285/35/18 at the same tire pressure (PSI) have the SAME contact patch! You read that correctly. Given two tires at the same pressure, the contact patch is the same. The benefit to wider tires is that you can run them at a lower pressure without overworking them. So… once you've done all your crazy tire upsizing, if you run the same pressure you were running before, you haven't gained any grip! Crazy, right?



2003.5 Tiag SMG ///M3
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