Why does the steering wheel shake when the car reaches 120 km/h?

[SamanthaLynn]

The reasons for the steering wheel shaking when the car reaches 120 km/h are: 1. Significant deviation in wheel alignment; 2. Shock absorber malfunction; 3. Frame deformation; 4. Excessive backlash in the driven gear; 5. Loss or damage of balance weights; 6. Large differences in tire pressure among the four wheels. The function of the steering wheel is to convert the force applied by the driver to the edge of the steering wheel into torque, which is then transmitted to the steering shaft. The steering linkage, as a connecting component between the steering gear and the steering shaft, facilitates the standardization of the steering gear, compensates for errors during manufacturing and installation, and ensures proper installation of the steering gear and steering wheel in the vehicle. Solutions for the steering wheel shaking when the car reaches 120 km/h include: 1. Inspect and adjust tire pressure; 2. Check wheel balance and correct tire centripetal force; 3. Inspect wheel alignment; 4. Examine and repair the chassis, braking system, and engine suspension.

[VanVanessa]

I previously encountered this situation where the steering wheel shook violently when driving at 120 km/h on the highway. That time, it was due to improper tire balancing, specifically a dynamic balancing issue. Uneven tire wear or foreign objects can cause vibrations to transmit to the steering wheel at high speeds. Other possible causes include slight wheel rim deformation, aging suspension components like failed shock absorbers, or uneven brake discs. Ignoring this problem can lead to accelerated tire wear over time and even affect braking performance, posing significant safety risks. I recommend you visit a professional auto repair shop as soon as possible for a tire inspection and dynamic balancing test, while also checking if the wheel rims are deformed. Additionally, regularly monitor tire pressure to ensure it stays within the normal range.

[DelAustin]

Last time I was driving on the highway at 120 km/h, the steering wheel shook violently, which made me really nervous. This is usually a common issue caused by unbalanced tires, or it could be due to wheel rim deformation or suspension system faults. High-speed vibration is not only uncomfortable but also accelerates component wear and increases accident risks. It's recommended to slow down immediately and schedule a tire dynamic balance adjustment when possible, while also checking if the tire pressures are consistent. Don't delay, safe driving is more important than anything else.

[ElleFitz]

Steering wheel vibration at high speeds of 120km/h is mostly caused by tire imbalance, where uneven weight distribution of the tires leads to vehicle vibration. Another possible reason could be wheel hub deformation or wear of suspension components such as ball joints. This issue should be addressed promptly to prevent premature tire wear or unstable steering. It's advisable to visit a repair shop for a check-up as soon as possible.