The Wider The Car Tires Better Performance?
Tires and ground contact friction according to the role of different divided into: grip, traction, braking force and lateral force. Their functions are different, but they all belong to the friction with the ground, and produce the same mechanism, the same factors.
The relative movement between the road and the tire there are two mechanisms:
First, the material frequency effect due to pavement texture. When the tire rolls over the rough point of the road, the rubber is deformed. The size of the rough surface of the road is between 1 cm and 1 μm. This mechanism is called as the influence of the road roughness. It has also become a pressure pit effect, emphasizing the role of the road surface bulge topping rubber.
Second, molecular adhesion, which occurs on a 0.01 micron scale, enhances molecular adhesion when slipping. The sticking effect comes from the molecular interaction within the interface between the rubber and the road surface. Binding between molecules, stretching, breaking, and so on.
This is the source of friction 2.
According to Coulomb's law:
1. The frictional resistance is proportional to the vertical load applied to the contact surface;
2. Frictional resistance and the apparent area of the sliding surface has nothing to do;
3. Sliding friction and sliding speed
It can be seen that the size and area of the friction resistance are not related to the speed and bearing. Therefore, a wider tire may increase grip, but with certain frictional resistance, it is bound to lose other aspects of performance.