Ever wondered if those “numbers on the sidewall” really matter when buying new tires? You’re not alone. Many drivers focus on brand or tread, but overlook the tire’s manufacture date—and that decision can impact your safety.
Why? Because even unused tires age and can become less reliable over time. In this article, we’ll explain why the tire manufacture date matters, what you should look for, and tips for making safe, informed choices about your next set of wheels.
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Does Tire Manufacture Date Matter? Everything You Need to Know
Choosing the right tires for your vehicle is more than just picking the right size and brand. One crucial but often overlooked detail is the tire’s manufacture date. You might wonder, “Does the tire manufacture date really matter?” The straightforward answer: Absolutely, yes. The age of a tire can directly affect your safety, your vehicle’s performance, and even your wallet. Let’s take a detailed look at why this is the case and how you can make smarter tire decisions.
Understanding Tire Manufacture Dates
What the Tire Manufacture Date Means
Each tire has a specific date when it was produced. This date isn’t just for the benefit of the manufacturer — it’s a critical piece of information for every driver. The age of a tire impacts its safety, regardless of how much tread appears to be left.
Why Tire Age Affects Performance
Over time, the rubber and other materials in tires start to degrade, even if the tire isn’t used often. Exposure to heat, sunlight, oxygen, and moisture breaks down the tire compounds, making them harder, less flexible, and less able to grip the road. As a result, aged tires can:
- Lose traction and braking effectiveness
- Be more prone to cracks and blowouts
- Become less responsive, especially in emergency situations
How to Read the Tire Manufacture Date
One of the most important skills for any car owner is learning how to read the manufacture date on a tire. Thankfully, it’s easier than you might expect.
Finding the DOT Code
- Locate the DOT Code:
Look at the sidewall of any tire. You’ll find a series of letters and numbers that start with “DOT” (which stands for Department of Transportation). - The Last Four Digits:
Focus on the last four digits of this code. These numbers represent the week and the year the tire was made. - The first two digits: Week of the year (from 01 to 52)
- The last two digits: Last two digits of the year
Example:
If your tire’s DOT code ends with “2219,” it was manufactured in the 22nd week of 2019.
Tips for Locating and Interpreting the Date
- Sometimes, the full DOT code is stamped only on one sidewall. If you can’t find it on the outward-facing side, check the inside.
- Ignore extra letters/numbers before the final four digits — only the last four tell you the date.
- For tires made before 2000, there’s a three-digit code, but these tires are far too old for safe use today.
Why Tire Age Is Critical to Safety
Tire Performance Declines
As tires age, their structural integrity weakens. This change may not always be visible to the naked eye. Issues like dry rot or internal separation can occur inside the tire, hidden from view.
Risks of Using Aged Tires
- Increased Blowout Risk: Aged tires are more likely to fail suddenly, often at highway speeds.
- Longer Stopping Distances: Tires lose grip as they harden and crack, leading to increased stopping distances.
- Less Predictable Handling: Old tires can make your vehicle less responsive, especially in rain or during sudden maneuvers.
How Old Is Too Old? General Guidelines
Most experts and manufacturers agree on the following guidelines:
- Replace tires every six years, regardless of tread depth or appearance.
- Never use tires older than ten years. At this point, the risk is simply too high, even for temporary use.
Many vehicle manufacturers recommend seeing your tires as “expired” after six years from manufacture. This is especially important if you drive infrequently or own a vehicle that spends a lot of time parked, like an RV or a classic car.
New Tire Shopping: What to Watch For
Ask for Recent Manufacture Dates
Some retailers sell “new” tires that were made years ago. While you might assume a brand-new tire is freshly made, that’s not always true. Ask to see the DOT code on the tires before you buy. Ideally, you want tires manufactured within the past year.
Check All Four Tires
Occasionally, tire sets can include one or more older tires mixed with newer stock. Inspect each tire individually to be sure.
Negotiate or Avoid “Old” New Tires
- If you find tires older than a year, you can often negotiate a discount—though it’s usually better to ask for fresher ones.
- Avoid accepting tires that are already nearing six years old, even at a heavy discount.
Practical Tips for Managing Tire Age
1. Make Tire Checks a Habit
- Inspect your tires regularly for the DOT code as well as signs of aging like cracks, bulges, or excessive dryness.
- Keep a record of the manufacture date along with the date you install the tire.
2. Consider Climate
- Tires age faster in hot, sunny climates compared to cool, shaded regions.
- Garage your vehicle if possible to slow the aging process.
3. Store Tires Properly
If you keep seasonal tires or spare tires:
- Store them in a cool, dry, dark location.
- Keep them away from motors, heaters, or direct sunlight.
- Place them upright, if possible, and not stacked flat for long periods.
4. Watch Out for RVs, Campers, and Second Cars
Vehicles that sit unused for long periods often have tires that look fine but are actually too old for safe use. Always check the manufacture date before long trips.
Common Challenges Drivers Face
Mistaking Tread Depth for Tire Health
It’s easy to think your tires are fine because the tread is still deep. Unfortunately, plenty of unsafe, old tires have almost new-looking tread. Always check the age.
“New Old Stock” Tires
Some cheap online or bargain shop tires are actually years old, despite being “brand new.” These may underperform or fail much sooner.
Confusing Manufacture with Purchase Date
Only the date the tire was made (not sold or installed) matters for aging.
Benefits of Checking Tire Manufacture Dates
- Ensures Safety: Helps avoid accidents caused by tire failures.
- Saves Money: Prevents premature wear or blowouts, which can damage your vehicle.
- Provides Peace of Mind: You’ll drive confidently knowing your tires are fit for the road.
- Optimizes Performance: Younger tires offer better grip, comfort, and control.
A Quick Checklist for Buyers
- Find the DOT code on all four tires.
- Check the last four digits for the week and year of manufacture.
- Ensure the tires were made within the last 12 months for best results.
- Avoid tires older than six years, new or used.
- Store records of installation and keep up with regular inspections.
Conclusion
The manufacture date of your tires is not just a technical detail; it’s a vital part of keeping yourself and your passengers safe. Tires age from the moment they’re made, not just from use. Making a habit of checking the DOT code and understanding what it means can help you avoid unexpected blowouts, enjoy better handling, and get the best performance from your vehicle.
Drive safe, and remember: When it comes to your tires, age matters just as much as appearance!
Frequently Asked Questions (FAQs)
1. How do I find out when my tires were made?
Look for the DOT code on your tire’s sidewall. The last four numbers tell you the week and year of manufacture (e.g., “3218” means the tire was made in the 32nd week of 2018).
2. Can I use tires that are over six years old if they look fine?
It is not recommended. Even if tires look good and have deep tread, the rubber degrades over time, making them more likely to fail.
3. Is it safe to buy discounted “new” tires that are a few years old?
It’s best to buy tires manufactured within the last 12 months. Older tires may be cheaper, but they lose flexibility and grip, which can impact safety.
4. Do spare tires and unused tires age just like those in use?
Yes. Tires age due to environmental exposure, whether they’re used or not. Always check manufacture dates before using spare or stored tires.
5. Should I replace my tires after a certain age even if I don’t drive much?
Yes. Experts recommend replacing tires after six years regardless of mileage. Rubber compounds break down over time, making old tires risky even if barely used.
Now you’re ready to make smart, safe tire choices—one date code at a time!
