Why does the steering wheel shake at high speeds?

[MarleyFitz]

The reason for the steering wheel shaking at high speeds is poor wheel dynamic balance. A car's wheel is an assembly consisting of a tire and a rim. However, due to manufacturing reasons, the mass distribution of this assembly cannot be perfectly uniform. When the car's wheels rotate at high speeds, this can lead to a dynamic imbalance, causing the wheels to vibrate and the steering wheel to shake during driving. To prevent or correct this phenomenon, it's necessary to adjust the wheel's balance in dynamic conditions by adding counterweights, ensuring that all edges of the wheel are balanced. This adjustment process is commonly referred to as dynamic balancing.