They work together to improve the model's controllability in all weather. The three center ribs keep the tire close to the road surface and upgrade the steering responsiveness, the driving stability and the braking ability. In other words, the steering becomes quick and more precise to the driver's instructions, the tire's structure becomes stabilized against the driving pressure affecting the tire, and the constant road contact creates friction at the moment of braking to ensure a shorter braking distance. The shoulder tread blocks increase the number of biting edges that grip the road surface, which boosts the cornering ability and power significantly, making the tire easily controllable.