What Causes Body Resonance and Shaking at 120 km/h?
2 Answers
The causes of body resonance and shaking at 120 km/h are as follows: 1. Brake-induced vibration: This is a relatively common issue caused by warped brake discs. When the braking surface of the disc develops noticeable wave-like patterns (uneven high and low spots), the brake pads will move unevenly during braking, resulting in vibration. The best solution is to replace both the brake pads and discs simultaneously, rather than replacing just one component. This prevents the new brake disc from being worn down again due to issues with the old brake pads. 2. Driveshaft-induced resonance: This problem typically occurs in long-wheelbase or rear-wheel-drive vehicles. The driveshaft, which transmits power from the engine to the rear wheels, has balance weights on its surface. If these weights are missing or the driveshaft is damaged, it can cause the driveshaft to wobble, leading to resonance. Additional Information: 1. Different vehicle models use tires with varying aspect ratios (the ratio of the tire's sidewall height to its width). High-aspect-ratio tires have longer sidewalls, which can absorb and filter out more vibrations but provide poorer road feedback and weaker lateral support. The sidewalls deform more significantly, reducing stability during crosswinds or sharp turns and increasing the "floaty" sensation. Low-aspect-ratio tires have shorter sidewalls, offering better anti-roll performance, less sidewall deformation, and more precise road feedback. While comfort may be reduced, handling improves, and the "floaty" feeling is minimized. 2. High-speed stability can also be affected by tire design. Low-aspect-ratio tires enhance control and reduce the sensation of floating, though at the cost of some comfort.
I've been driving for over ten years, and sometimes when the speed reaches 120 km/h, I feel the car body vibrate and shake, which makes me very uncomfortable. Based on my experience, the most common causes are unbalanced tires or uneven wheel wear, which can easily cause vibrations at high speeds. For example, the last time my car had this issue, I went to a tire shop for wheel balancing, and the shaking became much less severe. Additionally, warped brake rotors or worn wheel hub bearings could also lead to this problem. If not repaired in time, fuel consumption may increase, and the driving experience will deteriorate. I recommend regularly checking the condition of your tires and wheels and getting a four-wheel alignment before highway driving—it can save you a lot of trouble. Remember, ignoring the issue during high-speed driving may damage other components. Safety comes first, so try not to delay repairs.
