Finding the cause of a strange vehicle noise can feel like chasing a sound that refuses to introduce itself. Tyres and wheel bearings work closely together, which is why their noises can be confused.
As your vehicle picks up speed, tyre noise and wheel bearing noise can both become more noticeable. Since wheel bearings move with the wheels, a worn bearing can produce a humming, grinding or rumbling that gets louder as you speed. However, what seems like a bad bearing may actually be tyre noise. On the other hand, what sounds like regular tyre road noise could be an early sign of wheel bearing wear.
Of course, having the vehicle checked by a professional is still the best way to know for sure. There are clues that can help, but even experienced technicians can be puzzled by these sounds from time to time. Still, paying attention to how the noise changes can help you understand where it may be coming from.
What Does Car Tyre Noise Sound Like?
Tyre noise can change a lot based on the road surface. In some cases, the tread pattern can create noises that make you think something mechanical is starting to fail. Aside from that, tyre noise can change with different weather conditions. Changes in temperature can make the noise sound stronger or easier to notice.
Here are some of the common sounds associated with a tyre issue.
Humming
A steady hum that lifts with speed may be a sign that the tyre area needs a closer look. When the sound comes from the tyres, it may change depending on the road surface. If the sound changes a lot between road surfaces, the tyres may be the cause.
Whining
A high-pitched whining sound can happen when tyre pressure is not quite right. When tyres are underinflated or overinflated, the tread may not sit on the road properly. This sound may seem sharper than normal road noise.
Thumping Or Slapping
A thumping or slapping sound usually means something is not rolling smoothly as it should. This kind of sound often follows the rotation of the wheel. As such, it may repeat as the car moves. Sometimes, the noise may also come with a shake through the vehicle.
What Does Wheel Bearing Noise Sound Like?
Noises that come from the wheel bearing are usually heard from around one wheel. When the sound is still light, it can easily be mistaken for normal tyre or road noise.
The following are some of the common sounds that may point to a worn wheel bearing.
Constant Hum
A humming sound is also an early sign that the wheel bearing is starting to wear. Unlike a tyre hum, a wheel bearing hum is usually more constant. When that sound resembles metal running against metal, the bearing may be in much worse condition.
Rough Grinding Noise
A rough grinding noise is usually more concerning than a light hum or growl. Hearing this can mean the wheel bearing is no longer rotating smoothly. As such, it may place extra stress on the wheel assembly. Once the sound becomes very loud, it is best to stop driving.
Noise Gets Louder
A worn wheel bearing could be the reason for this kind of noise. This is especially possible if it gets louder as your car picks up speed. This type of noise often sounds like a coarse growl coming from around the wheel.
Tyre Noise Vs Wheel Bearing Noise: How to Know What's the Issue
As mentioned earlier, it can be difficult to determine if the noise is coming from the tyres or the wheel bearing right away. Watching for anything that changes the sound is a good starting point. Just as important is anything that does not affect the noise at all. These signs can help you decide if the tyres or wheel bearing should be checked first:
- If the sound becomes much more noticeable on rough roads, tyre noise is more likely. It may also become quieter once you drive on smoother roads.
- If the sound seems to change depending on where you or your passengers sit, the tyres may be a part of the issue.
- If the sound started after new tyres were fitted, the tyres should usually be inspected first.
- If it showed up after rotating the tyres, the change in tyre position may be involved.
- Before assuming the wheel bearing is the cause, the tyres should be inspected. This is if the noise came after the wheels were aligned.
- If the noise changes when the vehicle is moving from one lane to another, there is a high chance that the wheel bearing may be involved.
- If the tyres appear to be in good condition but the sound continues, the wheel bearings should be checked next.
Get The Noise Checked By Tyrepower
No matter where the noise is coming from, it is best to have it checked sooner. If your tyres seem fine but the sound refuses to leave, a local Tyrepower near you can help narrow down the cause. Find your nearest Tyrepower store to book a tyre check today.
FAQ
Could Both Wheel Bearings And Tyres Be The Culprit?
Yes, it is possible for both noises to happen together. This is why tyre noise and wheel bearing noise can sometimes be hard to tell apart.
Can Wheel Alignment Make Tyres Noisier?
Yes, it can. While the wheel alignment does not make noise on its own, poorly aligned tyres can cause the tyres to scrub against the pavement.
Can New Tyres Make More Noise At First?
Yes, new tyres can be louder at first. As they go through their break-in period, the tread settles. During this time, any manufacturing residue will gradually wear away. A deeper tread may also be the reason for a louder whooshing sound. As the tyres wear in, this should become less noticeable.
Can Old Tyres Make More Road Noise?
Yes, they can. More road noise can come from old tyres as the tread wears down over time. Aside from that, the rubber can also harden with age.
