Sorry, but tires wearing down in the middle went out with bias ply tires. Radials will not wear in the middle with higher pressures, even MUCH higher. How does it sound to get over 100,000 miles out of an Accord's OEM tires? See wayne at cleanmpg. Or my own tires, with only 15,000 so far, but they still look new with minimal wear anywhere.
Or this, earlier in this very discussion:
Quote:
Originally Posted by trikkonceptz
Well I will have my proof on un-evenly worn tires in about 50K miles I guess....
Prior to Hypermiling I had a set of tires on my vibe that didn't even last 12K inflated to 32psi, I replaced them with the exact same tire/brand/size and have had them inflated to 50psi since day one .... 20K miles later, they still look new and the car handles and coast incredibly well.
So already, I have proven AAA wrong, how wrong only time will tell.
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Also, from this
SAE paper (note that we're all using radials now),
Tread wear vs inflation pressure
Traction vs inflation pressure
Also about traction, how about this
article at tirerack?
Quote:
The tires ... were inflated to the vehicle manufacturer's recommended inflation pressures of 29 psi front and 33 psi rear, while the other car had its tires inflated 30% lower (20 psi in the front and 23 psi in the rear). We chose 30% underinflation because it was the percentage of loss initially established by the US DOT at which passive pressure monitoring systems must warn the driver of low inflation pressure on future cars.
...
The underinflated tires delivered acceptable steady-state cornering force once they stabilized on our test track's skid pad, but the car was uncooperative anytime it was asked to change directions. It proved to be over 2 seconds slower around our test course (2 seconds represents about a 7% loss of handling performance).
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