Where Is the Date on a Tire? How to Find & Read the DOT Code

You’ll find the tire date on the sidewall in the DOT code, usually near the rim. Look for the letters “DOT,” then read the last four digits of the Tire Identification Number. The first two digits show the week, and the last two show the year, such as 2910 for the 29th week of 2010. If the code has only three digits, the tire is pre-2000 and should be replaced. More details can help you inspect it correctly.

Key Takeaways

• The tire date is on the sidewall within the DOT code, usually near one rim edge.
• Read the last four digits of the DOT/TIN: the first two are the week, the last two are the year.
• Example: 2910 means the tire was made in the 29th week of 2010.
• A three-digit date code means a pre-2000 tire and should be replaced immediately.
• Check tire age regularly; many manufacturers recommend replacing tires at 10 years, even if tread looks good.

How to Read a Tire Date Code

To read a tire date code, look on the sidewall for the DOT marking and then find the last four digits of the code. This Tire Date Code is part of the tire identification number (TIN), which can contain up to 13 characters. On tires made since 2000, the final four digits show the date of manufacture: the first two digits give the week, and the last two give the year. For example, 2910 means the tire was built in the 29th week of 2010. Read this code exactly, because one digit changes the tire’s age and service status. If you encounter a three-digit TIN on a tire built before January 2000, treat it as aged out and generally replace it. You deserve clear, reliable information, so use the DOT code to judge remaining life and plan replacement before heat, load, and time reduce safety. Regularly checking your tire’s UTQG rating can also help you assess its longevity and performance.

Where to Find the DOT Code?

You’ll find the DOT code on the tire sidewall, where it starts with “DOT” and continues with a series of identifying characters. Check the last four digits in the TIN to locate the date of manufacture on tires made since 2000. If the code is only three digits, you’re looking at a pre-2000 tire that you should treat as obsolete. Regular tire maintenance is essential to ensure your tires perform optimally and last longer.

Sidewall DOT Marking

The DOT code appears on the tire sidewall, usually immediately after the “DOT” symbol, and it can run up to 13 characters long. You’ll use this tire identification number to verify the tire’s origin and date. Read the tire sidewall carefully: the first two or three characters identify the manufacturing plant, while the last four digits show the week and year of production, like 2910 for the 29th week of 2010. Check at least one sidewall, because the full DOT code may appear on only one side. If you find a three-digit TIN on an older tire, replace it; pre-2000 tires don’t meet modern safety standards. Inspecting the code helps you claim your right to safe mobility and recall registration.

TIN Date Location

Where can you find the tire date code? Look on the sidewall for the DOT code, which begins with “DOT” and contains the Tire Identification Number. You’ll usually find it molded into one sidewall, and the full code should stay visible on at least one tire face for identification and registration. The TIN can run up to 13 characters; the first two or three identify the plant. On tires built since 2000, read the last four digits as the date code: the first two show the week, the last two the year, such as 2910 for week 29 of 2010. If your tire shows only three digits, it’s pre-2000 and should be scrapped. Check deliberately, so you keep control of your maintenance.

What Each DOT Digit Means

You can read the DOT code as a tire identification number that tracks the manufacturer and build data. The first two or three characters identify the plant, and the following characters can indicate tire size or other production details. The last four digits show the week and year of manufacture, so you can verify the tire’s age quickly. Regularly checking tire age and condition can help ensure optimal performance and safety.

DOT Code Basics

Because the DOT code appears on the tire sidewall, you can use it to identify key manufacturing details at a glance. Read the DOT code from left to right: it starts with DOT, then up to 13 characters. The first two digits, or sometimes three, identify the plant code assigned by tire manufacturers, so you know where the tire came from. The next characters can show size and construction data, though their exact meaning may vary. Focus on the last four digits to find the date: the first two digits show the week, and the last two show the year. For example, 2910 means the 29th week of 2010. Tires built after April 13, 2025, use a 13-character code for compliance and traceability.

Plant And Size Codes

After the DOT prefix, the first two or three characters identify the tire’s plant code, which tells you where it was manufactured. You use this plant code to trace the production site in the DOT code, not the date code. Next, one or two characters show the tire size code, which matches the tire size and construction specification assigned by the maker. Together, these digits separate location from geometry, so you can read the marking with precision. Some DOT code strings also include up to four optional characters for internal construction details, such as materials or design features. Don’t confuse those identifiers with the final date code; they serve a different purpose. Reading them correctly gives you control over what the tire markings reveal.

Week And Year Digits

The last four digits of the DOT code are the date stamp, and they tell you exactly when the tire was made. You’ll find them at the end of the tire identification number (TIN) on the sidewall. Read the first two digits as the week of the year, from 01 to 52, and the last two digits indicate the year of manufacture. So 2319 means week 23 of 2019. Those four digits let you assess age fast, without guesswork. If you see a three-digit code, the tire was made before January 2000 and should be scrapped because it’s too old for safe service. Use the date code to schedule replacement on your terms, not the road’s.

Reading 7–12 Character TINs

A 7–12 character TIN appears on the tire sidewall, usually after the DOT code, and you can read it in sections. Treat the tire identification number (TIN) as a coded record: the first two characters identify the plant code, so you can trace where the tire was made. Next, one or two characters may state the tire size code, which confirms the dimensions you need. Then, up to four optional characters can mark construction details that distinguish that tire from others. Finally, the final four digits give the manufacturing date, with the first two digits showing the week and the last two the year.

• Find the DOT code first.
• Read each segment left to right.
• Match the plant code to the maker.
• Verify any size or construction code.
• Use the date digits to judge age and replace tires on your terms. Choosing the right tires, such as all-season options can significantly enhance your vehicle’s performance and safety.

Reading 13-Character TINs

If your tire’s TIN has 13 characters, you can read it by sections on the sidewall after the DOT code. The tire identification number (TIN) starts with three characters that identify the plant code, showing where the tire was made. Next, read the six characters that specify tire size and type; these details help you match the tire to your vehicle’s requirements without guesswork. Then inspect the last four digits, which tell you the week and year the tires were manufactured. For example, 2910 means the 29th week of 2010. You’ll often find this date code molded on only one sidewall, so check both sides if needed. Knowing how to read the TIN gives you control over safety checks, recall verification, and maintenance decisions. Additionally, understanding the UTQG ratings can further ensure you select tires that meet your performance needs. Don’t leave that knowledge to chance—use the code, confirm the facts, and keep your tires accountable.

When a Tire Is Too Old

Once you know the date code, you can judge whether a tire is too old to trust on the road. The date code is part of the tire identification number (TIN), and the last four numbers show the week and year of manufacture. If you find a three-digit TIN, the tire was made before January 2000; scrap it now. For tires older than six years, inspect them often, even if they still look usable. Aging rubber can crack, harden, or bulge at the sidewall, and those defects raise blowout risk. Most manufacturers advise replacement at ten years or sooner, because time, not just use, degrades safety. You protect your mobility by acting before failure forces it. Regularly check tire pressure to enhance safety and performance.

• Check the TIN on every tire.
• Read the last four numbers carefully.
• Track age against the manufacture date.
• Inspect tires older than six years regularly.
• Replace ten-year-old tires without delay.

How to Check Tread Wear

Check tread depth with the penny test or a tread depth gauge; if you can see the top of Lincoln’s head or measure 4/32 inch or less, your tires need attention. Inspect the built-in wear bars in the grooves, which become flush at 2/32 inch and signal replacement. Also watch for uneven wear patterns, since they can indicate alignment, suspension, or inflation problems. Regular tire rotations can help maintain even tread wear and extend the life of your tires.

Tread Depth Checks

Start by measuring tread depth so you can confirm your tires still have enough grip for safe driving. Check tread depth at several tread grooves with a penny: if you can see Lincoln’s entire head, the tread wear is excessive and you should replace the tire. For a precise reading, use a tread gauge and compare it with the tire DOT standard minimum of 2/32 inch (1.6 mm).

• Inspect tread wear indicators in the grooves.
• Measure all four tires regularly.
• Note any uneven depth between edges.
• Recheck after rotations or long trips.
• Replace worn tires before wet-road traction drops.

Consistent tread depth checks give you control, shorter stopping distance, and safer movement on demanding roads.

Wear Pattern Signs

Watch for wear pattern signs as you inspect the tread, because they can reveal when a tire’s grip is fading or a mechanical issue is developing. Check tread wear with the penny test: insert a penny into the groove; if Lincoln’s head shows, replace the tire. Confirm the built-in treadwear indicators too; when those bars sit flush with the tread, you’ve reached 2/32 inch. Measure depth with a gauge for a precise reading, and compare all four tires. Uneven wear on one side often points to alignment or suspension faults. Review the tire identification number (TIN) and maximum load and maximum pressure rating, then match them to your driving conditions. Low tread reduces wet traction, so act before safety slips away.

Why Tire Age Affects Safety

Tire age affects safety because rubber compounds break down over time, even when tread depth still looks acceptable. You can verify tire age by reading the DOT code; the last four digits of the tire identification number (TIN) show the week and year of manufacture. That date lets you judge safety before you trust the tire on the road.

• Check tires older than six years regularly.
• Inspect for dry rot and sidewall cracking.
• Watch for stiffness or loss of elasticity.
• Replace aging tires if performance drops.
• Follow the ten-year maximum, even with usable tread.

As tire age increases, traction declines and blowout risk rises. The tire may still roll, but its structure no longer delivers the safety you need for controlled braking and cornering. If you want mobility without unnecessary risk, use the DOT code, assess tire age, and replace compromised tires promptly. Additionally, consider the impact of tire quality on overall vehicle performance when evaluating aging tires.

What Other Tire Markings Matter

Beyond the DOT date code, the sidewall lists other markings that help you match the tire to your vehicle and use it safely. Read the tire identification number (TIN) to confirm the manufacturer, plant, tire size code, and production sequence. Check the type prefix, such as P or LT, so you know whether the tire was built for passenger or light-truck service. Match the size and construction details to your vehicle’s specifications before you mount anything. The load index tells you the maximum weight the tire can carry at rated pressure, and the speed symbol shows the top speed the tire is certified to sustain. Review the UTQG section for treadwear, traction grades, and temperature ratings. Traction grades A, B, and C show wet-road stopping ability, while temperature ratings A, B, and C indicate heat resistance under demanding use. These markings let you choose equipment that supports your mobility, autonomy, and safety.

When to Replace Your Tires

Knowing when to replace your tires starts with measuring tread depth and inspecting the sidewalls. If tread depth reaches 2/32 inch, replace tires immediately; that’s the legal minimum for safe performance. Check the tire identification number (TIN) on each sidewall, and if the tire is six years old or more, plan replacement even if the tread looks acceptable. Look for uneven wear, which can point to alignment or suspension faults that demand inspection. Verify pressure against your vehicle’s manual, because underinflation accelerates wear and shortens service life. Also watch for visible signs of damage, including cracks, cuts, and bulges, since these defects can fail without warning. Additionally, consider the tread life warranty offered by the manufacturer to gauge potential longevity.

• Measure tread depth at multiple points.
• Compare all four tires for uneven wear.
• Check pressure when tires are cold.
• Inspect sidewalls after every long drive.
• Replace tires at the first structural defect.

Frequently Asked Questions

How to Read a 3 Digit Dot Code?

You read a 3-digit DOT code by taking the last two digits as the year and the first digit as the week. For example, 381 means the 38th week of that year. Use DOT interpretation tips, then check Tire age factors and the Code location guide on the sidewall. Follow Safety inspection guidelines, because a 3-digit code means the tire predates 2000 and you shouldn’t trust it for service.

How Long Are Tires Good for After a Dot Date?

You should treat tires as good for about six years after the DOT date, and you shouldn’t exceed ten years. Your tire lifespan depends on storage, climate, and use, not just tread wear. Check for cracks, bulges, and uneven wear, because safety concerns rise as rubber ages. Follow replacement guidelines from the manufacturer, and replace sooner if performance drops, even when the tread still looks acceptable.

What if My Tire Doesn’t Have a Date Code?

No date code? You should treat that tire with caution. A silent, suspicious sidewall can signal old stock or a counterfeit. Use tire maintenance tips: inspect for signs of wear, verify tread, and check for cracks. For understanding tire age, consult a professional, since tire replacement guidelines usually favor scrapping unknown-age tires. Don’t gamble with safety; you deserve freedom through informed, precise inspection and timely replacement.

Can I Still Use a 7 Year Old Tire?

Yes, you can still use a 7 year old tire, but you shouldn’t rely on tread wear alone. You need to inspect it for replacement signs like cracks, bulges, dry rot, and uneven wear. Tire lifespan matters because rubber degrades with age, creating safety concerns even when tread looks good. If you drive often or carry loads, replace it now for reliable control, braking, and peace of mind.

Conclusion

Now you can spot the tire’s date code faster than a pit crew change and read it with confidence. Find the DOT marking on the sidewall, decode the last four digits for the week and year, and check tread wear before you hit the road. Don’t trust appearance alone—an old tire can look fine and still be a safety hazard. When the DOT date is too old or the tread’s too thin, replace the tire right away.