Do Tires Have A Date On Them? | What The Sidewall Tells You

Yes, every road tire carries a DOT code that shows its build week and year on the sidewall.

If you’ve ever stood next to your car and wondered whether a tire can be “new” and still be old, the answer sits right on the sidewall. Tires do have a date on them. You won’t see it written like a carton stamp. It appears inside the DOT tire identification number, and the last four digits tell you when that tire was made.

That small code matters. Tread depth tells one part of the story. Age tells another. A tire can still have decent tread and still be old enough to make you stop before a trip or a purchase.

Do Tires Have A Date On Them? Here’s Where To Find It

The date is part of the DOT code molded into the sidewall. Start by finding the letters “DOT.” After that, you’ll see a string of letters and numbers. The build date sits at the end of that string. On tires made since 2000, the date uses four digits: two for the week, then two for the year.

A tire ending in 1224 was made in the 12th week of 2024. One ending in 5123 came from the 51st week of 2023. Once you know that pattern, the code stops looking cryptic.

The Date Code Isn’t Always Easy To Spot

Here’s the part that throws people off: the full DOT code may appear on only one side of the tire. You may need to crouch down, turn the steering wheel, or check the inner sidewall to find the last four digits. NHTSA says to look on both sides of the tire if you don’t see the full code at first.

A brief glance can fool you. You might spot “DOT” and a partial string, then assume the date is missing. In many cases, it’s stamped on the side facing the suspension or brake parts.

Tire Date Code On The Sidewall And What It Means

The date code tells you when the tire was built, not when it was mounted on your car and not when you bought it. A tire can sit in a warehouse or at a shop before it ever touches the road. That’s why checking the sidewall date is smart when you buy a replacement tire, a spare, or a used set.

How To Read The Last Four Digits

The reading part is simple once you know the order:

• The first two digits are the production week.
• The last two digits are the production year.
• Weeks run from 01 through 52, and some years include a 53rd week.

A few examples:

• 0824 = 8th week of 2024
• 3522 = 35th week of 2022
• 0119 = 1st week of 2019

If you run into a tire with only a three-digit date code, you’re dealing with a tire built before 2000. At that point, age is the bigger issue than decoding it. A tire that old has no place in normal road service, even if it looks clean from a few feet away.

Why The Build Date Matters

Rubber changes with time. Heat, sun, storage conditions, and long idle periods all chip away at a tire’s condition. The date gives context that tread depth alone can’t give. A spare with low miles can still be old. A used tire can still look tidy and still be farther along in age than you’d expect. The date also helps when you compare tires on the same car. If one tire is much older than the others, that can explain why it looks drier or rides rougher.

What You See	What It Means	What To Do
DOT on the sidewall	The tire has a DOT identification code	Keep reading to the final numbers
Four digits at the end	Week and year of production	Read the first two as week, last two as year
1224	12th week of 2024	Count age from early 2024
5123	51st week of 2023	Count age from late 2023
Partial DOT code only	The full code may be on the other side	Check the inner sidewall too
Three-digit date code	The tire was built before 2000	Skip it for normal road use
Older date on a “new” tire	The tire may be unused but not freshly made	Ask the seller about age and storage
Older spare tire	Spare tires age too, even with low miles	Check it during routine tire inspections

When Tire Age Should Make You Pause

There isn’t one magic age that fits every tire in every situation. Still, tire age is not something to shrug off. The NHTSA tire buyers’ FAQ says the last four digits of the DOT code show the week and year the tire was made, and it tells drivers to check that date when buying tires. It also says to follow the vehicle maker’s tire replacement timing.

The tire trade uses a similar common-sense approach. The Tire Industry Association page on reading a tire sidewall says tires over six years from the build date should get at least yearly inspection for serviceability. That does not mean every six-year-old tire is done on the spot. It does mean age deserves a closer check.

Signs That Age Is Starting To Show

If the date code says the tire is getting up there, look for signs that back up the calendar:

• Fine cracks in the sidewall or tread blocks
• Hard, dry rubber that feels less pliable
• Odd vibration after balance checks
• Uneven wear that keeps coming back
• A spare that has sat untouched for years

Age should never be judged by tread alone. A tire with plenty of groove left can still be old stock, a neglected spare, or a used tire that has spent too much time baking in heat.

Situation	Smart Move	Why It Helps
Buying one replacement tire	Check the DOT date before payment	You avoid paying full price for older stock
Buying a used set	Read every tire, not just one	Mixed ages can hide a weak link
Driving on an old spare	Read the date before a road trip	Low use does not stop aging
Finding a three-digit code	Pass on the tire	It points to pre-2000 production
One tire looks drier than the rest	Compare all build dates	Age gaps can explain the mismatch
No full code on the outer sidewall	Check the inner sidewall	The date may be molded there

How To Check Tire Age Before You Buy Or Drive

This check takes less than a minute once you’ve done it a couple of times. You just need decent light and a clean view of the sidewall.

1. Find the letters DOT on the tire sidewall.
2. Scan to the end of that code for the final four digits.
3. Read the first two digits as the build week.
4. Read the last two digits as the build year.
5. Repeat the check on all four road tires and the spare.
6. Compare the dates with the seller’s claim or the rest of the set.

If the code is hard to read, wipe the sidewall and use your phone light. On front tires, turning the steering wheel can open up the view. On some cars, the inner sidewall is the only place where the full code appears.

Questions Worth Asking A Seller

If you’re buying new or used tires, ask plain questions and wait for plain answers:

• What is the DOT date on each tire?
• Have these tires been stored indoors?
• Are all four tires from the same production period?
• Has the spare been checked too?

A seller who dodges the date question is telling you something.

Mistakes People Make With Tire Dates

The biggest mistake is checking tread and stopping there. The next one is assuming a tire sold as new must also be freshly built. Another common miss is ignoring the spare. That tire may have almost no miles, yet it may still be the oldest one on the vehicle.

Some drivers also mix tire date with tire model year or purchase year. They are not the same thing. The DOT code tells you the production week and year. That is the date that matters when you judge age on the rubber itself.

If you want one simple habit to keep, make it this: every time you rotate tires, inspect for wear, or prep for a long drive, read the DOT date on all five tires.