The design with opened cross-grooves/shoulders provide better capability with self-cleaning and grasp force, improved the trafficability on mud/damaged road.

The utiliza tion with wave-shape steel plates greately improved the grasp force of the tire.

The design with tooth- mate pattern grooves makes the tires having better self-cleaning capability, and improved the grasp force and trafficability on damaged road.

The design with anticollision rib improved the self-cleaning capability and avoid the stones clamped and improved the puncture resistance of the tire.