Why does the car still shake at 120 km/h after tire balancing?

[VonCarmen]

First, it is necessary to determine whether the wheel balancing was done accurately, as there might be issues with the balancing process. If the balancing is confirmed to be correct, the shaking at high speeds could be due to other factors. There are numerous potential causes for vehicle shaking at high speeds, such as problems with the tires, drivetrain, or suspension system. The following is an introduction to car tires: 1. Definition of car tires: Circular elastic rubber products mounted on various vehicles or machinery that roll on the ground. 2. Function of car tires: Mounted on metal rims, they support the vehicle body, absorb external shocks, maintain contact with the road surface, and ensure the vehicle's driving performance.

[DelAna]

I recently encountered a similar weird issue. Even though the tires were balanced, the whole car starts shaking alarmingly once I hit 120 km/h. This is likely due to improper wheel balancing or problems with the rims themselves. For instance, if the rim is slightly deformed—maybe from hitting potholes—its surface becomes uneven, causing instability even after balancing. Another possibility is that the rim edges weren’t properly cleaned during tire installation, causing balance weights to fall off or shift, affecting precision. Additionally, worn-out suspension bushings can fail to absorb vibrations at high speeds, leading to severe shaking. My advice: first, revisit the repair shop for a rebalance, insisting they use precise equipment to check rim roundness. If the shaking persists, inspect the tie rods or shock absorbers for looseness. Safe driving is crucial—don’t ignore such vibrations, as they can lead to accidents. Avoid rough roads to protect your rims.

[MacStella]

Experiencing vibrations on the highway after wheel balancing is common due to improper balancing procedures or chassis system issues. The technician might have failed to calibrate the machine correctly during balancing, or there could be rust on the wheel hub that wasn't cleaned properly during tire installation, causing the balancing weights to adhere poorly. Slight wheel deformation is also a frequent issue, especially after hitting speed bumps or potholes, leading to an uneven surface that causes shaking. Worn suspension bushings or unbalanced brake discs can also contribute to the vibrations. From my experience, it's usually necessary to retest the wheel's flatness with a high-precision balancing machine, while also checking for consistent tire pressure and any unusual noises from the bearings. Regular maintenance checks on wheel condition are recommended, and avoid sudden acceleration while driving.

[MaggieMarie]

I've dealt with similar issues before. If the car still shakes at 120 km/h after wheel balancing, the problem might lie in the rims or chassis. Rim deformation is a common cause – hitting potholes can make the rim surface uneven, causing shaking even after balancing. If the rim isn't thoroughly cleaned during tire installation, grease or dust can prevent the balancing weights from sticking properly, reducing effectiveness. Worn suspension bushings lose elasticity and can't absorb vibrations at high speeds, making the whole car wobble. I recommend redoing the wheel balancing first, ensuring the rims are clean and even. If the shaking persists, check the wheel alignment or steering system. This vibration affects handling and is dangerous at high speeds.

[SamuelRose]

If the car still vibrates at high speeds after wheel balancing, it often indicates issues with the balancing itself or related components. The wheel rim may be deformed—for example, prolonged driving on bumpy roads can cause localized warping, resulting in an uneven surface that triggers vibrations. The mechanic might have improperly used the balancing machine or carelessly installed the tire, leaving dirt on the wheel rim edges uncleaned, which can render the balancing weights ineffective. Worn suspension bushings or loose bearings can also cause noticeable shaking at 120 km/h. I recommend an immediate inspection, requesting a double-sided test during rebalancing to ensure the wheel rim's integrity, followed by checking the suspension for cracks or looseness. Ignoring such vibrations can lead to abnormal tire wear or even loss of control, making regular maintenance crucial.

[LaLola]

I've encountered this situation while driving too. Even after getting the wheels balanced, the car still shakes at high speeds of 120 km/h. This usually stems from improper balancing or chassis issues. Slight wheel rim deformation is common after bumpy driving, and surface irregularities can't be compensated by balancing. If the rims aren't cleaned properly during installation, residual grease can cause balancing weights to misalign and fail. Worn suspension bushings lose their ability to absorb high-speed vibrations, making the car prone to shaking. I recommend redoing the balancing test first, ensuring the rims are round and rust-free, and also checking for wear on shock absorbers and tie rods. High-speed shaking affects stability, so address it early to avoid safety hazards. A quick tire condition check before driving is very helpful.