I finally got the Kumhos out on some twisties tonight. There were too many deer out so I took it easy, but I still was able to lean on them in a few spots. I'm pretty impressed. They aren't as much of a dropoff from the PZeros as I expected. Definitely better than the Potenza RE92's the car came with. Makes me wonder if they will last very long. But damn, for $70 each mounted & balanced, they rock.