The optimal tread design features three center ribs and closed shoulder patterns that closely follows the road surface at all times. This increases the model's steering responsiveness and driving stability significantly, even at high speed performance. In other words, the steering becomes faster and more precise in its responsiveness to the driver's commands, while the structure is stabilized against the driving pressure affecting the tires. The closed shoulder pattern keeps the tire's road contact constantly, heightening the number of biting edges gripping the road surface during cornering and maneuvering.