Absolutely love these tires!
I have these on my 2011 135i, around 600whp, fully upgraded suspension include spherical bearings everywhere. They warm up quickly have excellent grip going straight and while cornering. So I can use them for both half mile racing and hpde. Compared to my last set of tires, federal fz201m, these have much more grip and are dead on the freeway. I have completed one track day starting with 28psi cold, and the wear was even and very good. Thanks kumho and simple tire!