What is tire feathering?
Tire feathering is uneven tire wear, specifically an angled tread wear pattern on your car’s tires. This “feathering” creates a worn leading edge followed by a raised edge on each tire tread block.
If left unchecked, these wear patterns become excessive, causing road noise, rapid tire wear, and handling issues.
What causes tire feathering?
Tire feathering is caused by improper vehicle alignment and or worn suspension components, along with a lack of basic tire maintenance.
Uneven wear caused by tire feathering boils down to the integrity of your car’s suspension components, the alignment, and whether or not you perform regular tire maintenance.
If your alignment is off, or there’s a worn component allowing the alignment angle to change while driving, it won’t take long for the uneven tire wear patterns to show up.
In this article, I’ll explain everything you need to know about feathered tires. I’ll show you the causes, the symptoms, and the fixes.
Let’s get started…
What is the difference between a feathered tire and a new tire?
Feathered Tire = Noise, rapid wear, lousy handling, did I mention NOISE?
New Tire = Quiet ride and good handling
A new tire has “tread blocks” that are flat and level across the tire’s width, this gives you traction and allows your tires to displace water in heavy rain.
The leading edge of a feathered tire tread has worn down, and the opposite edge has been raised on an angle, into a sharp edge.
The result is uneven road contact that produces a rumbling noise while driving. It resembles something like a worn wheel bearing… or an M-14 army tank depending on how you look at it.
One thing is for sure, it’s annoying.
Even worse, the inner edge of the affected tire wears down WAY faster than it should. The bald edge caused by feathering makes it necessary to replace tires that are in otherwise good condition.
Here are some terms that refer to tire feathering…
- Tire scalloping
- Tire cupping
- Tire feathering
- Tire scuffing
Tire feathering symptoms: 3 things to watch out for
You now know that feathered tire tread causes uneven contact with the road.
As each tread hits the pavement it creates noise as the worn leading edge and the raised back edge roll over the pavement.
The faster you roll, the louder it gets. Here are some telltale signs of tire feathering.
A Rumbling noise that increases with speed
You may start to notice a slight noise that seems to follow the speed of your driving. A slight growl that you can’t put your finger on.
As the irregular wear increases it may get loud enough to warrant concern.
A slight vibration, especially at low speeds
You feel like your car rolls “rough,” especially while driving slowly and turning the steering wheel.
Felt mainly on slow turning maneuvers like pulling into a parking spot. The vibration is caused by the uneven tread’s contact with the road surface, tight turns while rolling slowly will amplify the feeling.
You can feel it on the tire tread
The easiest way to confirm irregular tire wear and cupping is to run your hand carefully across the entire tire tread surface.
The tire tread should feel smooth in both directions, if it feels raised on one side of the tread like a mild version of a rubber cheese grater, your tires are feathering.
wheel alignment is out of specification
In almost every case of tire feathering the car’s alignment is the cause.
Feathering occurs when the tire travels down the road at the wrong angle. A proper alignment corrects this and plays a big part in reducing abnormal tire wear and improving handling.
More times than not feathered tire wear occurs when the camber angle of the wheel is too negative, and the toe adjustment is out of specification.
Here’s an easy way to visualize this…
Imagine a tire rolling along on a perfect alignment, you wouldn’t see much wear over time because the tire is contacting the road straight and true. The entire tread face is in contact with the road at the same time.
Under perfect conditions, the tire will wear evenly across the entire tread face.
Now take the same tire and lean it over a few degrees, then turn it slightly to the right.
Now the situation is different, the tire will start to show uneven wear patterns because the tread is contacting the road with an outward angle and leaning over.
The tire will wear at the edge it’s leaning towards and the leading face of the tread contacting the road will start to wear down as the tire “scuffs” down the road.
Meanwhile, as the tire continues to roll misaligned, the following edge of the tread block becomes thicker, forming a jagged edge.
Like pushing beach sand into a pile, the friction created by the misalignment “shifts” the rubber into a tiny hill or “ramp.”
Worn-out suspension components
A common cause of uneven tread wear, tire cupping, and overall poor handling is worn-out suspension components. This can be anything from a torn bushing to a blown-out strut.
This is the reason why your car’s suspension should always be inspected before an alignment is done.
Skipping tire rotations
One of the best ways to prevent tire feathering is to rotate your tires every 6,000 to 8,000 miles. Regular tire rotations even out wear and can greatly increase the lifespan of your tires.
Incorrect tire pressures
Keeping your tires filled to the correct pressure is critical in keeping your tires from developing uneven wear patterns.
Here’s how under and over-inflation affects tire wear.
Overfilled tires: When tires are over-inflated the result is increased wear at the center of the tread face and road noise.
Underfilled tires: Tires that need some more pressure will wear on the outer edges, this is because there is not enough pressure to push the center of the tread to the road surface.
Poor quality tires
You get what you pay for is a very true statement, especially regarding tires.
Cheap tires require more weight to balance and will hit their minimum tread depth faster. In the case of tire cupping, cheap tires don’t stand a chance. Do yourself a big favor and purchase high-quality tires to avoid feathering and other issues.
Blown-out shocks or struts
Shocks and struts are designed to dampen spring oscillation over bumps.
Without properly working shocks the wheel will rapidly bounce on and off the road after every bump, causing the side of the tread block to “punch” the road rapidly. This is a major cause of tire feathering.
Shocks are filled with gas and fluid that allows them to dampen spring bounce. Over time the shocks can “blow out,” essentially turning the shock into a worthless tube.
If there is an oily film on the shock tubes of your car chances are you have leaking shocks.
Is tire feathering a serious problem?
Yes, you can drive on feathered tires.
Overall tire feathering is the type of tire wear that’s more annoying than it is serious. With that said, feathering may become more serious if the tread face is cupped badly enough to affect overall handling.
Also, if the problem is not corrected in a reasonable timeframe, your tires can rapidly wear and become unsafe due to sheer lack of traction.
Can feathered tires be saved?
Mild feathering isn’t necessarily the end of your tire life, it may not be too late to save them.
Depending on the severity it’s possible to correct the uneven wear with a proper alignment, tire rotation, and correctly set tire pressures.
After a suspension inspection and fresh alignment, rotating the tires will start to create a new wear pattern and slowly begin to reverse uneven tire wear.
Not all, but in many cases, the feathering on your tires may start to smooth out.
How to keep your tires in good condition
Proper tire maintenance isn’t all that complicated, follow these quick guidelines to keep your tires in great shape for as long as possible.
- Check the pressure of your tires every month
- Have your tires rotated every 6,000 to 8,000 miles
- Have your vehicle’s alignment checked every year
- Avoid using tire shine and aggressive degreasers that can cause tire rubber dry cracking
- Avoid buying poor-quality tires in the first place
When to see a tire service professional
It’s time to call a professional tire shop if you feel a noticeable change in your car’s handling and stability down the road.
Safety is the priority here.
Tires that wear unevenly are one thing, but when it comes down to a major suspension issue, tires that have hit the minimum tire tread depth, or any other unsafe situation, having your car inspected by a professional is the best route for you and everyone around you on the road.
Wrapping up
Hopefully, this article sheds some light on the menace known as tire feathering.
If you are experiencing road noise, poor handling, or your car just doesn’t feel right, run your hand over your tires and feel for the type of wear pattern explained here.
Not into DIY? Have a good mechanic check your car over. With the knowledge you gained here, you can feel confident while talking with your mechanic about your tires.
