What is a wheel bearing?
What is a hub bearing? It is a component in the wheel assembly that connects the wheel to the axle. It allows your wheels to turn smoothly with very little resistance.
Understanding this part and how it works can help you determine when you may need to make repairs. Here's what you need to know about how hub bearings work and how to tell if your hub bearing needs to be replaced.
WHAT IS A WHEEL BEARING?
Wheel bearings reduce friction and let your wheels spin freely. They’re held within small rings located within the wheel hub assembly. The two most common types are ball bearings and roller bearings.
Roller bearings are small cylinders that sit within a cylinder housing. They are easy to access for repair but also easily contaminated by dirt and grime. Ball bearings, on the other hand, are little balls that are typically sealed. While this keeps them free of contamination from dirt and grit, it also means they usually can’t be serviced if something goes wrong and will need to be replaced.
WHEN GOOD WHEEL BEARINGS GO BAD
Typically, wheel bearings last for 75,000 to 100,000 miles, depending on your vehicle and where you drive. When they go bad, you’ll notice a variety of symptoms, including unusual noises such as a clicking, grinding or humming.
Uneven tire wear can also be a symptom of bad wheel bearings, but you might just need an alignment. Loose steering or a vibration in the steering wheel are other signs that something may be wrong. A more severe symptom is a wheel lock. In this case, the bearings become so damaged that they can stop moving. You may even get a warning light on your dashboard indicating that either your traction control or ABS system is malfunctioning.
REPAIR OR REPLACE?
The best course of action is to replace bad wheel bearings. Unfortunately, this isn’t a matter of simply removing a single bearing and replacing it with a new one. Instead, the job usually requires a new wheel hub assembly. If you notice your wheel bearings are going bad, make the time to have them replaced instead of delaying action and risking additional damage to your car.
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