The specific distribution and shape of the knobs along with their sharp edge provides the best traction on all terrains and in all racing field.
Rear sizes feature also a smooth contour design which lends to includes more knobs under the footprint area that ensures both traction and wear resistance.
The main benefits of the 6 DAYS EXTREME tread design are:

Extreme traction
Self-cleaning
Precision in straights and braking stability
Cornering stability
Lateral support