You’re driving down the interstate, and as you come up to cruising speed, the steering wheel starts to vibrate in your hands. You grip a little tighter and press the accelerator a little more. The vibration gets worse, and it feels like your molars are going to vibrate right out of your mouth. But traffic is still passing you at breakneck speed, so you speed up a little more. The vibration seems to dissipate and you relax into your commute.
What causes your car to shake? Sometimes it’s just a little annoyance that goes away on its own, and other times it progresses so quickly you feel like you’re sitting on a washing machine in the agitate cycle. Many things can cause your vehicle to vibrate or shake. Here are a handful of causes to watch out for.
Tire balancing
The simplest and most common reason for your vehicle to shake is tire balancing. Balancing a tire is a process of adding small amounts of weights to each wheel or rim with a tire installed on it. They are placed strategically with the assistance of a machine that spins the assembly when it is removed from your car with the purpose of making the wheel’s weight perfectly balanced all the way around.
简单的半盎司重量在驾驶时会引起明显的振动。它也可能导致过早或异常的轮胎磨损。可以在高速公路速度下以轮子平衡问题，尤其是每小时55-65英里。有时，振动在高于65 mph的速度下是不可思议的。
Tires are balanced when they are installed, or at least they should be. Sometimes a weight can fall off. Tire balancing should be corrected to prevent unnecessary costs associated with premature tire wear.
Bent rim
Have you ever gone up on a curb when parallel parking? Have you ever hit a pothole really hard that you couldn’t avoid in time? A sudden impact on your wheel can cause a bent rim.
弯曲的边缘表现出与轮胎平衡问题相似的症状。在大多数情况下，唯一的区别是何时明显振动。当轮辋弯曲足以发生振动时，每小时40英里的感觉就会更快。以更高速度行驶时，这种振动不会消失。
A bent rim needs to be addressed for safety reasons. The tire’s seal on the rim can be compromised and a blowout or sudden loss of tire pressure is possible. The tire can also wear unevenly like a tire balance issue. Often, a rim can be straightened or repaired instead of replaced, depending on the severity.
Tire separation
Tire separation doesn’t mean the tire came off. It means that the layers of rubber in the tire that have been laminated together are coming apart. You may notice a bulge in the sidewall of the tire, or a goose egg on the tread on close examination, but it may not be visible to the naked eye either.
轮胎分离的最常见原因是与路缘或坑洼接触。轮胎的层被捏住，轮胎内部的空气在它们之间散布。从本质上讲，轮胎不再完全圆形，会引起振动。由于轮胎在该位置明显较弱，因此分离可能是一个安全问题。当轮胎分离发生时，低速下以低速的驾驶感觉会以更高速度的快速振动发展。
Unfortunately, the only correction for tire separation is to replace the affected tire. This may mean replacing two or four tires to ensure the tread wear is the same on all your tires.
Steering components loose
If you’re vehicle has a few years on it, or is higher mileage, you may notice the steering isn’t quite as responsive as it used to be when you first purchased your car. That’s quite common; steering components wear. There may be a little more play in the steering wheel before your car reacts to your input. That’s caused by steering component wear.
拉杆端是从转向器，机架和小齿轮到车轮的链接。它们是一个小球和插座，可以垂直和水平行进。当这些拉杆末端松动时，车轮不会保持牢固地指向您的方向。允许侧面移动，而过度松动的拉杆会以任何速度造成不良振动，并且可能会随机发生和关闭。对于内部拉杆或任何其他磨损的转向部件，也可以说同样的话。
When a vibration occurs from a steering component, only a trained professional will be able to determine and repair it. Have a vibration checked expediently.
Loose wheel bearing
宽松的车轮轴承将导致与散乱的转向部件相似的症状和相似的情况，这是因为它们密切相关。车轮轴承允许车轮自由旋转，同时将固体安装保持到车辆。如果车轮轴承磨损或松动，则车轮以任何速度行驶时可以四处移动。发生的摇动可能会来来去去，并且不会遵循任何常规模式。
车轮轴承有时会重新包装并在某些款式的车辆上进行调整，但是到目前为止，最常见的车轮轴承风格是安装在轮毂中的。如果该轮毂具有播放，则将其替换为组件，否则就无法维修。
Brake pulsation
Your brakes can also cause your vehicle to shake, and is the most common cause of your vibration if it only shows up when you are decelerating. Brake pulsation is caused the the brake rotors or drums on your vehicle are no longer perfectly flat. When the brake pads press against the rotor, it isn’t able to apply constant continuous pressure. It causes a sudden and high frequency vibration in the vehicle that diminishes as you come to a stop.Brake pulsationneeds to be addressed as soon as possible due to its effect on safety. Brake pulsation increases your stopping distance and can cause loss of control in slippery conditions.
