Why does the steering wheel shake when the car reaches 120 km/h?
2 Answers
When the car reaches a speed of 120 km/h, the most common reason for steering wheel shaking is issues with the car's tires. The causes of the problem and precautions are as follows: Specific reasons: Uneven mass distribution across different parts of the tire can cause dynamic imbalance when the wheel rotates at high speeds, leading to severe steering wheel shaking while driving. There are many reasons for wheel dynamic imbalance, including the detachment of balancing weights, tire repairs, excessive wheel rim repairs, or a large amount of mud on the inner side of the rim. Precautions: Regular dynamic balance checks for the wheels can not only extend tire life but also improve the stability of the car while driving, avoiding traffic accidents caused by tire wobbling, bouncing, and loss of control at high speeds.
I've been driving for over a decade and have encountered steering wheel vibrations on highways many times. The main cause is usually improper wheel balancing. At high speeds, tires rotate extremely fast, which amplifies any minor imbalance. Additionally, uneven tire wear, bulges, or slight wheel rim deformation can also cause this. Aging suspension systems, worn bushings, or loose ball joints can exacerbate vibrations at high speeds. I always advise friends to first visit a tire shop for a wheel balancing check—it's affordable and effective. If necessary, have the suspension components inspected. Safety comes first; vibrations can interfere with steering and are especially dangerous on highways, so don't delay addressing the issue. Regular maintenance checks on tire pressure and wear can prevent problems before they occur.
