This is a related clip that anyone concerned about tires and how long they should last should watch....this includes those brand new Old stock tires on the dealers rack, like Sears.....then go out and check the date on the tires for all your vehicles in your driveway.
http://abcnews.go.com/Video/playerIndex?id=4826897
Clip is from July 2008, about 9 and half minutes from ABC, neither Obama or McCain are included.