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Old 12-09-2008, 05:54 PM   #45 (permalink)
CapriRacer
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I didn't realize this post was being taken so seriously. So here's my corrections to this. Apologies to Tasdrouille for not adressing this earlier.


Quote:
Originally Posted by tasdrouille View Post

............

The RRC is almost the same from 0 up to 55 mph, when it starts to increase rapidly. At 80 mph, it is roughly twice as much as 55 mph.

.......
RR is only 29% greater at 100 mph as it is at 35 mph for tires without cap plies - and only 13% greater for tires with cap plies.

Ref: The Pnuematic Tire, published by NHTSA Aug 2005, pg 494

Quote:
Originally Posted by tasdrouille View Post

.........

The relation between tire pressure and RRC is almost linear, and is still significant in excess of 100 psi.
The relationship between inflation pressure and rolling resistance is a decreasing curve (as the inflation pressure increases). The difference between 40 and 48 psi is only 2%.

Ref: SAE Paper 800087 - The Effect of Inflation Pressure on Bias, Bias Belted, and Radial Tire Performance by B. L. Collier and J. T. Warchol, B. F. Goodrich February, 1980

Quote:
Originally Posted by tasdrouille View Post

..............

Blowout risks related to sudden pressure rises in overinflated tires are non existent as radial tires will not unbed under 150 psi.
A tire's ability to absorb an impact decreases 20% as the inflation pressure increases from 32 psi and 40 psi.


Ref: SAE Paper 800087 - The Effect of Inflation Pressure on Bias, Bias Belted, and Radial Tire Performance by B. L. Collier and J. T. Warchol, B. F. Goodrich February, 1980
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