Whys is My Spare Tire Humming?

Whys is My Spare Tire Humming? (Easy Fixes for Common Causes)

In this gripping piece, we’re going to explore the mysterious case of your humming spare tire. Believe it or not: these are the very insights I’ve gathered from personal experience with my own spare tire’s befuddling hum. Let’s delve into this together, shall we?

Have you ever been on a peaceful drive only to be interrupted by a perplexing hum from your spare tire? Well, I’ve been there too, and it’s as puzzling as a squirrel trying to solve a Rubik’s Cube. The jarring noise can turn an otherwise pleasant trip into a symphony of confusion. But fret not, my friend! I’ve faced this head-on and have some seasoned advice to share.

Let’s create a pact, you and I. A pact to dive deep into this perplexing world of oscillating spare tires, to find the source of the issue and more importantly, the solution. So, buckle up – we’re in for quite a ride! In this journey, we will learn, we will laugh, and in the end, we’ll conquer that humming spare tire together!

Spare Tire Pressure and Humming Noise

High tire pressure can indeed cause a ticking or humming noise when your car is moving. This is typically due to incorrect inflation pressure or wear and tear. Underinflated tires can cause more noise as they result in vibrations against the walls of the tires. On the other hand, overinflated tires can also lead to noise due to a decrease in the tire’s contact area with the road.

In my opinion, maintaining the correct tire pressure is one of the simplest ways to avoid any strange sounds. From what I’ve seen, it’s best to check your tire pressure regularly as part of your basic car maintenance routine. Remember, properly inflated tires not only reduce road noise but also improve fuel efficiency and overall vehicle performance.

The Role of Tire Age in Spare Tire Humming

Did you know that tire age plays a role in spare tire humming? That’s right. Like any other part of your vehicle, tires are subject to wear and tear over time. As they age, the rubber hardens, which can lead to increased noise.

Manufacturers suggest replacing tires every six to ten years, regardless of tread wear. This is because aged tires might not provide the same level of safety or performance as newer ones. When tires get old, they tend to get noisy. Therefore, if your spare tire is humming, it could be a sign that it’s time for a replacement.

Impact of Tire Tread on Spare Tire Humming

Speaking of wear and tear, the condition of your tire’s tread can significantly impact the noise it produces. A spare tire with more tread may produce a humming noise, especially compared to the other tires on your vehicle. This is because different tread patterns can create different sound waves while the car is in motion.

Uneven wear on tires can also lead to a humming noise. Regular tire rotations can help avoid this problem by ensuring the tread wears more evenly. This not only prolongs tire life but also improves fuel efficiency and overall vehicle performance.

Wheel Alignment Concerns and Spare Tire Humming

Misaligned wheels can cause vibration and noise while driving. When your wheels are out of alignment, your tires aren’t facing the right direction. This can cause your tires to wear unevenly, which in turn, leads to noise and vibration.

Wheel alignment issues can indirectly contribute to noise-related problems in your vehicle. From what I’ve experienced, getting your wheels aligned can make a considerable difference in reducing the humming noise from your spare tire. So, if you’ve been ignoring that wheel alignment service, it might be time to schedule an appointment.

Tire Damage as a Cause of Spare Tire Humming

Physical damage to your spare tire can cause it to hum. This could be a result of hitting a pothole, curb, or debris on the road. A visual inspection of your spare tire can help identify any obvious signs of damage.

If your spare tire is damaged, it likely needs to be replaced. Replacing a damaged tire promptly is not just beneficial for reducing noise; it’s also crucial for your safety and to prevent your car from incurring further damage.

Now that we’ve covered the potential causes of spare tire humming, let’s look at what you can do about it.

What Causes a Spare Tire to Hum

Diagnosis of a Noisy Spare Tire

The first step in dealing with a noisy spare tire is diagnosis. This involves a careful inspection of the tire for any obvious signs of damage or wear. You might need to remove the spare tire and check for debris or foreign objects that could be causing the noise.

Another common cause of spare tire noise is a deteriorating wheel bearing. This is often heard when changing lanes and can be diagnosed by driving the car while someone watches the suspect wheel.

Avoiding a Noisy Spare Tire

Avoiding a noisy spare tire largely comes down to regular maintenance. This includes maintaining proper tire pressure, regular tire rotations to ensure even wear, and getting your wheels aligned as needed.

The Importance of a Quiet Spare Tire

A quiet spare tire is important for more than just your comfort. Excessive noise can be a sign of a potential problem that could affect your safety and the overall performance of your vehicle.

Solutions for a Noisy Spare Tire

If you’ve diagnosed that your spare tire is indeed causing the noise, there are several potential solutions. These include replacing the wheel bearing or hub assembly, replacing the wheel bearing seal, or replacing the entire wheel.

The Cost Implication of Replacing a Noisy Spare Tire

The cost of replacing a noisy spare tire can vary depending on several factors. These include the car model, the type of tire, and where you get it replaced. The cost of a new tire can range from $100 to over $1,000, and most places charge a flat $20-25 per tire for installation.

Troubleshooting Spare Tire Noise

Now, let’s look at some specific steps you can take to troubleshoot spare tire noise.

Check the Health of Your Tires

The first step in troubleshooting is to check the health of your tires. This involves visually inspecting your tires for any signs of damage or uneven wear. You also want to check the tire pressure and make sure it’s at the recommended level.

Talk to the Dealership/Mechanic

If you’re unable to identify the cause of the noise, it might be time to talk to a professional. A dealership or mechanic can provide a more thorough inspection and potentially identify issues that you may have missed.

Replace Your Bearings

If the humming noise is due to worn-out bearings, they will need to be replaced. This is something that should be done by a professional, as it involves removing the wheel and potentially other parts of the vehicle.

Rotate Your Tires

If uneven wear is the cause of the noise, rotating your tires can help. This involves switching the tires from front to back, which can help ensure they wear more evenly.

Spare Tire Replacement: A Solution for Humming Noise

Finally, if all else fails, it may be time to replace your spare tire. While this can be costly, it’s often the best solution for eliminating excessive noise and ensuring the safety and performance of your vehicle.


How do you know if your spare tire is bad?

A bad spare tire can produce excessive noise, show signs of uneven wear, or have visible damage. If your spare tire is making a strange sound, it’s likely time for a replacement.

Can uneven tires cause a spare tire to hum?

Yes, uneven tires can cause a spare tire to hum. This is because uneven wear can lead to differences in tread depth, which can produce noise when the car is in motion.

Why do my tires make a humming noise when I go 60 mph?

Tires can make a humming noise at high speeds due to several factors. These include high tire pressure, uneven wear, wheel alignment issues, or physical damage.

Can low tire pressure cause a humming noise?

Yes, low tire pressure can cause a humming noise. This is because underinflated tires can create vibrations that lead to noise.

Why is my spare tire making a grinding noise?

A grinding noise from your spare tire could indicate a problem with the wheel bearing or hub assembly. This should be checked by a professional as soon as possible.


In conclusion, a humming spare tire is often a sign of an underlying issue that needs to be addressed. Whether it’s due to high tire pressure, uneven wear, wheel alignment issues, or physical damage, it’s essential to identify and address the problem promptly. By maintaining your tires and addressing any issues as they arise, you can help ensure a smooth, quiet ride and prolong the life of your tires.