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Tire pressures

Wheels and Tires

Vehicle Information: Model : 997; Year: 2006; Mileage: 23,000;

Currently I keep the tire pressure set at the factory recommendation. I have the Michelin Pilot Sport tires. If the tire pressure is increased or decreased by 2 to 4 lbs per tire what effects will that have on, tire noise, tire wear, performance/handling in normal highway/city use?

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