The continuous center ribs maintain the tire's close and constant road contact to upgrade the steering responsiveness and the driving stability. In this manner, the steering becomes faster and more precise in its response to the driver's commands, while the structure is stabilized against the driving pressure affecting the model. The reinforced internal structure, on the other hand, upgrades the high speed durability. It keeps the optimal tire shape under the high speed pressure, while the silica compound keeps the tire cool during the drive. This combination guarantees a safer high speed performance as the tire does not deform under the pressure.