What Causes Car Shaking at High Speeds?
2 Answers
High-speed car shaking can be attributed to the following reasons: 1. Uneven brake disc surfaces with excessive radial runout. During braking, the inconsistent contact between brake pads and discs causes fluctuating braking force, resulting in body vibration—especially noticeable during light braking. 2. Significant deviation in wheel alignment data. This makes the vehicle harder to control during acceleration, accompanied by slight vibrations. 3. Improper tire pressure (either too high or too low). Overinflated tires intensify shaking at higher speeds, while underinflated tires cause the vehicle to pull to one side. 4. Abnormal tire wear. Irregular tire surface wear due to misaligned wheels or rim deformation leads to body vibration during driving.
When driving on the highway, my car shakes violently, which is quite annoying. The most common cause is unbalanced tires, such as not performing dynamic balancing after a tire repair, leading to noticeable shaking at high speeds. Deformed wheels or rims can also cause this, especially after hitting potholes. If the brake discs are worn, the car will shake even more when braking. Issues with the suspension system, like damaged shock absorbers, can make the car bumpy and unstable. Problems with the drive shaft, causing uneven power transmission, can make the entire car feel like it's shaking. High-speed shaking is dangerous, affects handling, and can accelerate component wear. I think if you notice this, first check if the tire pressure is consistent, then have a mechanic perform a comprehensive inspection—don't let it turn into a major issue. Regular maintenance should include paying attention to wheel conditions, as prevention is better than cure.
