The sidewall does not deform under the driving pressure and the tread maintains its optimal road contact, upgrading the steering responsiveness, driving stability and cornering ability. The steering is faster and more precise in its responsiveness, the tire's structure is stabilized against the driving pressure affecting it and the shoulder tread provides additional biting edges for a safer cornering and maneuvering ability in this manner. The stronger structure also prevents deformation under the driving pressure, allowing the model to perform to its best ability with ease.