Jamikest, I have to admit you are convincing me. I had a nail in my tire early on but didn't know it. The low tire light came on at the beginning of my 40 mile commute, and I admit that I drove another 120 miles (home and back to and from work the next day) because I couldn't even tell which tire was low and figured it was minor.

When I took it to the dealership, they discovered the nail and that I had been driving on a tire that was 10 lbs low. They fixed the flat no problem. But it was those tough sidewalls that kept that tire going without any other damage.

Especially considering that I'm not one to do regular maintenance like checking tire pressure, I'm thinking your advice might be best (although I'm still gonna make the purchase at Discount Tires...the dealer gets all my other work. Thanks for taking the time!