The solid center rib keeps the tire close to the road surface, which improves the steering responsiveness and driving stability. In other words, the steering is 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 optimized shoulder tread blocks increase the number of biting edges that firmly grip the road surface during cornering and maneuvering situations. This results in a secure control and performing capability.