Tire coefficients of friction (Mu) refer to the measurement of the grip or traction that a tire has on the road surface. It is an important factor in determining a vehicle's handling and braking performance.
Tire coefficient of friction (Mu) is typically measured using a device called a dynamometer, which applies a force to a stationary tire and measures the resulting frictional force. This measurement is then compared to the weight of the vehicle to determine the Mu value.
The coefficient of friction of a tire is affected by various factors such as the type of tire, road surface conditions, air pressure, and temperature. A tire with a softer compound and a larger contact area will generally have a higher Mu value.
The tread pattern of a tire plays a significant role in its coefficient of friction. A tire with a deep and aggressive tread pattern will have a higher Mu value, providing better grip on wet or slippery surfaces. On the other hand, a worn-out tire with a smooth tread will have a lower Mu value and may increase the risk of skidding.
Maintaining the correct tire pressure is crucial for achieving optimal Mu and ensuring safe driving. Under-inflated tires have a smaller contact area, which can decrease the Mu value and reduce traction. Over-inflated tires, on the other hand, have a smaller contact patch, leading to a higher Mu value and reduced handling and braking performance.