What's changed is in order to keep up with the Jones's you gotta have new rubber on. This new tire seems to hold up very well in Nebraska I think Hines said he ran that same tire for 3 nights. Depends a lot on track conditions as to how the tire holds up through it all. Getting into the hot summer months we probably won't see multiple nights on a tire but overall it seems to do what it's supposed to and rightfully should with a $200 price tag. This thread has drifted so far from where it started maybe Steve and Carla should post another one and all the haters and nay sayers should stay on this one.