2006 Toyota Sienna 160,000 miles. I bought new tires last year. Michelin 80,000 mile tires. The issue is the front tires wore out in less than a year. Discount tires would not rotate them. I had to buy two new tires. My question is: Do you think this is a Toyota Sienna van problem or do you think the wife hit a few potholes? The steering wheel has a very small shimmy – you can hardly notice it.