How Often Should You Replace Your Tires?

When Should I Replace My Tires?

The answer to how often you need to replace your tires depends on a bunch of things:

• Your driving style — Aggressive starts and stops, for example, will wear down your tires’ tread.
• Tire type — Softer tires, such as summer tires, are designed for road grip, so their tread wears faster.
• Treadwear rating — The higher the number, the longer the treadwear is expected to last. Our article, What Does UTQG Tire Rating Mean, explains treadwear.
• Tire age — Tires have a finite shelf life, and they all have expiration dates, typically 6 years from the date of manufacture. Here's how to find when and where your tires were made.
• Inactivity — That’s right: A tire that sits for a long time and doesn’t get used is susceptible to dry rot, which we explain later.

The real question, though, is how to tell when and if your tires need to be replaced, which is what we cover next.

How Do I Know When I Need New Tires?

There are a couple of ways you'll know that it's time to replace tires. The most obvious is by checking the tread depth, which we cover in the next section. Less obvious are the sights, sounds and sensations you might experience while driving.

Excessive vibration: Say you’re cruising down the road when suddenly your ride feels a bit rougher than usual. Maybe your steering seems off, or your car is vibrating more than usual. These might seem like small annoyances, but your tires could be trying to tell you something. You might also feel it in your seat or steering wheel. Excessive vibration can mean a tire is out of balance or has internal damage. And if you’re constantly topping off tire pressure, it could be a slow leak or an aging sidewall — either way, that tire isn’t holding up like it should.

Uneven tread wear: Uneven tread wear is another common red flag. If your tires are more worn on one edge, in the center, or have a strange cupping pattern, this could point to issues with inflation or even your suspension system. In these cases, replacing the tires is only part of the solution — an alignment or mechanical inspection may also be necessary.

Unstable handling: Finally, consider how your car is handling. If it feels less stable in the rain, takes longer to stop, or slides more easily in snow, worn tires could be the culprit. Reduced traction isn’t just annoying — it’s dangerous.

Your tires are your vehicle’s only contact with the road. Listening to the warning signs they give you isn’t just smart — it could save you from an accident or a breakdown.

What Tread Depth Means It's Time to Replace Tires?

How do you know when you need new tires based on tread depth? Typical new tires have a tread depth of 10/32 of an inch (10/32”), but some mud tires, all-terrain tires, and off-road tires have deeper depths closer to 15/32”. The standard depth for replacing tires is before the depth reaches 2/32” — at 2/32” or lower, the tire is bald and dangerous.

• Sufficient tread: 6/32” to 10/32” (6 mm to 8 mm) — the tires are safe for driving
• OK tread: 4/32” to 5/32” (3 mm to 5 mm) — the tires will soon need to be replaced, especially if you drive in snow, ice and rain.
• Replaceable tread: 3/32 tread depth (2 mm) or lower — it’s time to replace your tires!

How to measure tire tread depth

You can buy a tire tread depth gauge for under $10 from any auto supplier, or you can use the coin test.

The coin test uses a Lincoln penny to measure a tire’s depth. The rule says: Place a penny Lincoln-head-down in the groove of a tire and, if Honest Abe’s head disappears, your tread depth is deep enough for safe driving. However, if you see the top of his head, you’re less than 2/32” of an inch, and it’s time to replace those tires.

Here’s the rub: Do not check just one spot of the tire. Run it along several inches of the tire because tires can wear unevenly, depending on your vehicle, driving style, and terrain. If any part of the tire is worn, it’s time to replace it.

Regular checks and proper maintenance can help extend their lifespan. When they are at about 50% wear, it's a sign to start considering new tires. After six years at the most, make sure to assess their condition and replace if needed.

What are tire wear bars?

Modern tires have a built-in indicator that tells you when it’s time to replace them. They’re called wear bars, and they are little tread marks that are placed throughout the tires at approximately 2/32 of an inch, which is the hazard point of a tire. Learn more about tire wear bars.

_{Source: Cooper Tire}

How Often Should You Get New Tires?

Even if everything looks fine from the outside, age can still catch up with your tires. Rubber breaks down over time, especially in extreme weather. Most manufacturers recommend replacing tires every 6 to 10 years, or after driving 40,000 to 100,000 miles, regardless of tread condition. Even if they appear in good condition, tires should not be used for more than 10 years. You can check the age of your tire by reading the DOT code on the sidewall — the last four digits tell you the week and year it was made.

Tire Age: Do Tires Expire?

As we explain in “Tire Number Meanings,” every tire sold in the United States has to follow DOT tire age laws. The US Department of Transportation requires tire makers to mark all tires with the week and year the tire was made. To find your tire's "birthday," look for the DOT marking. The last four numbers represent the tire manufacturing date.

For example, a tire marked DOT CPEX 3ET 0318 was made in January (third week) of 2018.

Tires will dry and rot faster if they sit for a long time in one position, under the weight of a vehicle, exposed to weather, and aren’t driven. For people who live in hot and dry climates, the risk for cracking and sidewall weathering is even greater.

It’s also important to keep your tires properly inflated, so they last as long as possible. Driving on overinflated or underinflated tires is not only dangerous, but it’s also bad for the rubber. Tire pressure guides are typically published on a sticker on the inside of the driver’s door. You can also find them in your owner’s manual.

Tread Replacement Miles: How Many Miles on Tires Before Replacing?

Newer car models have built-in tire pressure monitoring systems (TPSM) that alert drivers when their tires are underinflated. If you see this light, you need to check your tire pressure. If it is low, fill the tire to the manufacturer’s recommended pressure.

How many miles should a tire get? A manufacturer’s warranty is a slight indication of how long tires are expected to last, in terms of miles. The honest answer is, there is no way to tell how many miles you will be able to drive on a tire.

Best Time to Replace Tires

How do you know when you need new tires? Do not go solely by mileage when deciding when it's best to change your tires. Follow these simple rules:

• First and foremost, if your tires have 2/32” or less tread depth, it is time to replace them.
• If your tires are more than 6 years old, replace them.
• If your tires have exceeded the mileage warranty (if they came with one), it might be time to replace them.
• If you hit the tires’ wear bars, which we’ll explain later in this article, it’s time to replace the tires.
• If you are an aggressive driver, you’ll need to replace your tires sooner than the average driver.

Replacing Tires Based On Tire Type

According to most manufacturers, and even the law in most areas, your tires should be replaced when the tread depth reaches 4/32” in the winter and 2/32″ in the summer. If your tread depth wears to those levels, your tires are considered bald and a safety hazard.

When to replace winter tires

The same rules for checking tread depth apply to winter tires as they do for all vehicle tires. However, you should replace winter tires when they are half worn, long before they wear to 2/32”. Why? Winter tire treads are designed to get you safely through slush, snow and ice. Their deep grooves are engineered to push snow and slush away from your vehicle, so you don’t slip and slide.

By the way, to avoid dry rot and get the most from your winter tires, during the off season, store your tires in a cool, dark and dry place, not outside where they are exposed to the elements.

When to replace summer tires

Apply the same tread depth standards to your summer tires as you do for the three-season or all-season tires. When tread depth gets below 4/32” start shopping for tires. Follow the same storage rules as you would for any tire — store them inside if possible, protected from weather conditions.

When to replace mud tires and all terrain tires

All-terrain and mud tires need much more than 2/32” to be effective, and because they’re built for off-roading, they might wear unevenly. While the rule says 2/32”, we advise replacing mud and all-terrain tires when they are at about 50% wear. So, if the tire measured 15/32” when it was new, you should start shopping for replacements when they wear to about 7/32”.

Extending Tire Life: FAQs & Tips

To wrap it all up, these are the takeaways from this guide.

• How old can tires be and still be safe? Most tires have a life expectancy of about 6 years.
• When should I change my tires? When they are older than 6 years, or when their tread depth is 2/32 of an inch or less.
• How do I measure tire depth? You can buy a tire depth measuring kit, or you can use a penny. Insert it upside down, and if you can see the top of Lincoln's head, you need new tires now.
• Tire replacement: How often? Every six years or when the tread depth is 2/32".
• Do I need to replace tires at 3/32, 4/32, 5/32? Probably, soon, and not yet.
• How long can you drive on 2/32 tires? Long enough to get to off the road safely. Replace your tires now. 

To extend the lifespan of tires on cars, do these things:

• Always ensure your tires are properly inflated. Have your auto shop check tire pressure each time you have an oil change.
• Rotate tires every 3,000 to 5,000 miles
• Balance and align every 5,000 to 6,000 miles, or twice a year
• Practice good start and stop habits when you drive. Peeling out on a start and slamming on brakes is bad for your tires (and your vehicle).
• Have your tires checked immediately if you notice pulling, vibrating, or strange sounds.

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