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Old thread, BUT... I think the over inflating of the tires comes from the attempt to decrease rolling resistance to increase fuel economy. Usually those over inflating tires are driving slower and using hypermiling techniques. They aren't concerned with speed/cornering/braking/acceleration performance as much. Most of a hypermiler's "performance braking" occurs at much less than 25 mph.
I would agree that if you use your vehicle for circle track/racing/drag strip etc, then how you inflate your tires is extremely important. Track temperature, weather conditions and lots of other variables all play a part in where the starting pressure is set, so that the tires will be at their best performance after they are "warmed up".
Good information though.
my 2 cents
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