What does wheel dynamic balance mean for a car?

[EvelynLynn]

The dynamic balance of a car refers to the balance between the wheels when the vehicle is in motion, commonly known as adding balancing weights. A car's wheel is an integrated unit composed of the tire and the rim. However, due to manufacturing imperfections, the mass distribution of this unit may not be perfectly uniform. When the wheel rotates at high speeds, this can lead to dynamic imbalance, causing symptoms such as wheel wobbling and steering wheel vibration during driving. To prevent or correct this condition, weights are added to the wheel while it is in motion to adjust the balance at various edges. This adjustment process is what is commonly referred to as dynamic balancing. New cars undergo dynamic balancing before leaving the factory. However, frequent driving on rough roads can damage the rims or cause tire wear, leading to imbalance over time. Most tire repairs involve removing the tire from the rim, and standard procedures require dynamic balancing after such operations. Additionally, dynamic balancing is theoretically necessary after replacing tires or rims, or installing internal or external tire pressure monitoring systems.