The ribbed tread design manages to closely follow the road surface at all times, which increases the steering responsiveness and the driving stability significantly. In this manner, the steering becomes faster and more precise in its responsiveness to the driver's commands, while the structure is secured against the driving pressure affecting the tire. The optional continuous shoulder tread block placement heightens the number of biting edges gripping the road surface, which upgrades the cornering capability and power. The better controllability enables the tire's safer high speed performance throughout the year.