As a result, the tire's steering responsiveness and driving stability are upgraded. The steering becomes swift and precise in its responsiveness to the driver's instructions, while the tire's shape is stabilized against the driving pressure. The high rigidity sidewall design also increases the cornering and maneuvering ability by maintaining its optimal shape under the driving pressure. The enhanced maneuvering ability ensures a better and more secure high speed performance. The reinforced sidewall rigidity improves the tire's high speed performance as well. It prevents deformation during the drive, allowing the tire to perform to its best capability.