Dual Compound Tire has tall knobs designed to penetrate and hold on loose terrain.

Cloxxki's verdict:

These tire are to grip what the Bugatti Veyron is to speed : the absolute King, Sultan and Emperor.
Of course they don't roll too fast, but they up for that with grip, traction and more grip.
The ultimate front tire for agressive riding on any trail surface. They come with will-not-slide warranty. Well not really, but we might actually do that! Maybe it will slip on a curling rink covered in leafs.