My wife has an 04 is300 with Cooper zeon run flat tires. I drove her car last night because she borrowed my truck. I took an off ramp at speed, and noticed just a bit of oversteer. I thought it was strange, because her car normally is very neutral. I get home and check the tires out to find a cut left front tire. 0 air pressure!
Wow I took that off ramp briskly, and the car was very stable with just the little bit of oversteer, as I mentioned. Still much better than most cars on the road handle under the best of conditions. So I get home an begin to interrogate the wife, and it comes out that she clipped a curb three weeks earlier.
The car was not even pulling, and she doesn't drive it hard enough to notice a little bit of oversteer. I would like to thank cooper for keeping my wife and kids safe over the last three weeks!