I have 16k miles on the car, a huge majority are highway miles, and sides are worn so bad that I'm going to need new ones in a couple of weeks or so. I'm talking worn down to or past the wear bar, but that is just on the outsides of the front tires. I have the stock goodyears and I drive normal w/ a 50 mile drive a day for work. Most of the 50 miles is spend under 40mph or so.