The notched center rib improves the tire's road contact at all times. The better road contact upgrades the steering responsiveness and driving stability. In this manner, the steering is quicker and more precise in its responsiveness to the driver's instructions, while the structure is stabilized against the driving pressure affecting the tire. The optimized tread's shoulder blocks heighten the number of biting edges gripping the road surface during cornering and maneuvering, ensuring a secure driving experience throughout the tire's lifetime.