Wheel Runout: The Hidden Cause of Vibration

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With the tyres and wheels of your vehicle the only part that makes constant contact with the road surface, it follows that keeping these components in good, working order is essential. For drivers, that means not only regularly inspecting their tyres for any signs of damage and excessive wear but also noticing the signs of a deeper issue and knowing what to do next.

Wheel runout is one of those issues that drivers may not necessarily be able to identify and diagnose themselves, though the signs and symptoms will be obvious. In this blog, we’re looking at the signs of wheel runout, what it means, and what you need to do to fix the issue.

What is Wheel Runout

Wheel runout is an underlying issue with the formation and shape of the wheel, in which the shape doesn’t form a perfect circle.

While most of us take the smooth run of our vehicle for granted, this is only possible because of the uniform shape of the wheels. When this shape is knocked or imperfectly finished, even the most minor deviation in shape can have a huge impact on the driving experience and lifespan of the tyres.

There are two main types of wheel runout – one caused by a variation in the measurement from the wheel rim to the outer edge of the tyre, and one caused by the incorrect seating of the tyre which allows it to wobble from side to side.

Most Common Signs of Wheel Runout

Before we dive into the causes of wheel runout and what drivers can do to rectify the issue, let’s first consider the signs that you should look out for.

If when driving you experience vibration throughout the vehicle, you notice the steering wheel pulling towards one particular side or direction, or you notice uneven tyre wear, these are all common signs of wheel runout. You may also find that the brakes start to rub and create a whining sound, or that the tyres are not running smoothly on the road.

Of course, there are other potential issues at play that could be causing these signs – however, noticing these is a good starting point for diagnosing wheel runout.

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What Causes Wheel Runout?

With that in mind then, what is it that causes wheel runout and leads to wheels and tyres that are no longer perfectly circular?

It could be that wheel runout is caused by the installation of the tyre, or it could be damage to the wheel rim which prevents the tyre from sitting correctly.

The most common causes include:

  • Damaged wheel rims, often as a result of bumping the kerb or driving over a pothole
  • Improper tyre installation, which means the tyre isn’t sitting correctly on the rim
  • Extreme uneven tyre wear

It’s worth noting here that wheel runout gets worse over time, and if left untreated will continue to worsen and potentially cause further damage to wheels.

What Drivers Can Do to Fix Wheel Runout

In a case of suspected wheel runout, the first thing to do is to accurately measure the wheel’s shape and position to diagnose the issue.

If it’s found that the wheel or tyre is imperfect in its position or shape, some of the typical adjustments to make include remounting the tyre, replacing especially worn and uneven tyres, and repairing or replacing bent or damaged wheel rims.

While many of the adjustments and repairs will undoubtedly improve the ride experience and quality of your vehicle, safety is another factor at play. When a wheel or tyre is misshapen, the handling is less predictable – which can lead to safety concerns is left unaddressed. That’s why it’s important that drivers never ignore vibrations and/or changes to the way their vehicle responds to steering and braking.

If you’re concerned about the feel of your vehicle, our team can offer advice on some basic tyre checks to make. Get in touch for specific advice, or check our range of other articles to learn more about tyre maintenance, wheel safety checks, and more.

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