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Old 10-29-2008, 02:37 PM   #28 (permalink)
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Originally Posted by trebuchet03 View Post

Grip is proportional to static Mu (mechanical system properties of rubber/road) and mass.


Sorry, but tires do not conform to the classical physics interpretation of friction: F= uM (gee, I wish I could post Greek letters!!)

That's because the tread rubber penetrates the road surface texture. That results in a situation where the max grip is acheived at a percentage slip - which classical physics says is the regime of sliding friction (and at a value lower than static friction).

See figures 6.7 and 6.8

Tire Technology, excerpt no. 2 from The Racing & High-Performance Tire

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