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Old 05-18-2009, 01:28 PM   #4 (permalink)
Ernie Rogers
Ernie Rogers
 
Join Date: Feb 2008
Location: Pleasant Grove, Utah
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Quote:
Originally Posted by CapriRacer View Post
I'm wondering:

1) Since inflation pressure is a major factor in the spring rate of a tire, and since tires grow (and shrink) based on that pressure, that setting the pressure accurately enough might be a problem!

2) Since most of the rolling resistance inherent in a tire itself is a function of the tread compound, would differences in the weight of the other components adversely affect the accuracy of the result? Put another way: Would the presence (or absence) of rim flange protectors have an effect on the results?
Hello, Racer, you might have to explain your questions--

I don't get the first one. The tire would be mounted on a wheel and set to the desired pressure. Maybe you are suggesting there is a change in pressure between before and after mounting on a car? Such a change could be corrected for.

Second question, first part--Is it true that tread area dominates rolling resistance? That suggests that tread design is also an important factor, if true. Second part--what is a rim flange protector?

Ernie
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