Procircuit's K1 and K2 clay compounds provide maximum efficiency and grip on indoor clay tracks, oily tracks, hard packed dirt tracks with a high level of humidity or even on mixed tracks with synthetic surfaces such as carpet, astroturf, concrete, slippery curves or cobblestones.

K compounds work differently from C standard compounds. While C compounds are very dependent on the temperature and grip, the performance of K compounds depends on the grip and the surfaces.

With the K compounds we achieve greater driving stability because the rubber is not as elastic as the C compound and centrifuges less at full throttle.