Good questions! The old tires were set at 32psi and the new tires are set at 35psi. I only drove the old set of tires for 3,000 miles. The person I bought the car from didn't drive too much. Would buying a wider size Michelin MXV4 like a 205/55/15 help or do I just need to get something else besides Michelin like a Pirelli P400?