DOT Date Code & Tire Age Explained

Tires are of vital importance since they are the only part of the vehicle that makes contact with the road. Yet motorists often neglect their condition and age, and the results can be catastrophic. In its most recently available information, the National Highway Traffic Safety Administration says that people died in from tire-related crashes. As a tire ages, small cracks in the rubber begin to develop over time, appearing on the surface and inside the tire. This cracking can eventually cause the steel belts in the tread to separate from the rest of the tire. Tread separation can also happen to defective, underinflated and poorly maintained tires. Hot climates will also accelerate the aging process.

Read Motorcycle Tire Date Codes in 5 Seconds

Tires are just about the most important part of your car. If they’re in bad shape, the car’s ability to accelerate, stop, and turn in all conditions is greatly compromised. Everybody knows to replace tires when the tread gets down to the wear bar, but what about when they get too old? The rubber in tires deteriorates over time due to UV and environmental exposure.

The resulting “dry rot” leaves tire structure brittle and leads to sidewall damage and eventual failure.

Manufacture Date: If your tire is older than years, be sure to check the trailer tire for dry-rot as it may be time to replace your trailer tires. Also, be sure that the.

Aaron Yoder is an assistant professor in the department of environmental, agricultural, and occupational health at the University of Nebraska. He says the manufacture date is a Department of Transportation code of 10 or 11 numbers embossed on the inside of the tire. The last four numbers include a two-digit week code and a two-digit year code. No matter how old the tires are when you buy them, the most important aspect of tire safety is regular maintenance and inspection.

Our local chemical company was happy to give plastic totes Skip to main content. By Jodi Henke. Read more about Machinery. More Machinery.

What Do the Numbers on a Tire Mean?

Because safety is our top priority, the National Highway Traffic Safety Administration and the Department of Transportation want to make sure you have the tools to avoid being in vehicle crashes. The only thing between you and the road are your tires. TireWise provides drivers with information about buying tires, tire maintenance and labeling, aging, fuel efficiency, and tire retailers.

Hello guys, I have a set of old Michelin X tires on my car. I know they are not original, but I’m trying to find out how old they are. (I wont.

For years, people have relied on tread depth to determine when to replace a tire. If the tread passes the ” penny test , ” they assume the tire still has life, regardless of how old it is, which can be a fatal mistake. Old tires are dangerous, regardless of tread depth. While there’s no federally sanctioned safety guidance on when a tire is too old to be safe, many carmakers recommend replacement at six years from the date of manufacture.

When he was driving two weeks later, the tread suddenly separated from the tire. The Explorer went out of control and hit a motorcycle, killing its rider. An analysis of the used tire revealed that it was nearly 10 years old. In a more recent and high-profile example, the investigation into the cause of the accident that killed the actor Paul Walker revealed that the Porsche Carrera GT in which he was riding had 9-year-old tires.

Should auto tires have a sell-by date?

Tires, like most other auto parts, are built to withstand a great deal of wear and tear. Unlike other car parts, however, tire manufacturers always give an estimate for about how long a tire should last. The estimates themselves can range greatly for each tire, but you’ll usually see a manufacturer listing of how many tens of thousands of miles you may expect out of that particular tire. When it comes to car part longevity, however, there are always circumstances when the auto part information given by a manufacturer may not apply.

In the case of tires, the estimate of how long a tire can last is based primarily on the tread wear.

Many automakers, including Ford, Nissan, Mazda and Mercedes-Benz, tell owners to replace tires six years after their production date.

A frequent question about tire maintenance concerns service life. How long will your tires last before you should replace them? The answer depends on different factors such as your driving style, the tread design of the tire, regional climate, road conditions, and how frequently the car is in use. Another factor is you, the driver. Just like the rest of the vehicle, you have an essential role in the care and maintenance of the tires on your wheels; they will last longer the better you look after them.

You’re also responsible for deciding when it’s time to replace worn tires with new tires. Use the following guidelines to assess the point of maximum service life for your tires. If you still have questions beyond this article, try consulting a professional at your local tire dealer; they’ll be more than happy to help.

Continental builds and designs our tires to provide thousands of kilometers of excellent service. Achieve maximum benefit from your tires by taking care to avoid damage from improper use that may shorten their lifespan. The conditions that you subject your tires to over the course of daily use — inflation pressure, load, speed, road hazard injury, and so on — are key to determining service life.

Replacing tires

The chronological age of any tyre can be found on the tyre sidewall by examining the characters following the symbol “DOT”. The last four numbers identify the date of manufacture of the tyre to the nearest week. The first two of these four numbers identify the week of manufacture which range from “01” to “53”. The last two numbers identify the year of manufacture e.

How old are the tyres? When was the tyre manufacturing date; How long will the tyres last? Well, here’s my 5-second guide to reading tire date.

The chronological age of any tire can be found on the tire sidewall by examining the characters following the symbol “DOT”. The last four numbers identify the date of manufacture of the tire to the nearest week. The first two of these four numbers identify the week of manufacture which range from “01” to “53”. The last two numbers identify the year of manufacture e.

For tires manufactured prior to the year , three numbers instead of four indicate the date of manufacture. We recommend: All tires including spare tires that were manufactured more than ten years ago should be replaced with new tires, even if they appear to be usable from their external appearance and if the tread depth may have not reached the minimum wear out depth. Tire Finder. Canada en FR. Switch now to summer tires from Continental.

How Old Are Your Tires? Check the Born-On Date

The DOT number, an alpha-numeric code found on the tire sidewall, has consistently confused consumers and tire professionals. The last four characters of the character code contain the week and year the tire was made. For example, signifies that the tire was made during the third week of Tires made prior to used a three-digit date configuration at the end of the DOT code.

In those cases, signifies that the tire was manufactured during the third week of — or the A change is necessary because safety is involved, particularly the tire aging issue.

If you’ve ever wondered how old your tires are, it’s an easy bit of information to find actually have a “born-on” date, and it’s listed right on the tire itself.

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Registered in England and Wales. Number Wayne Wenzel Nov 09, SRS President Sean Kane said rubber can begin to degrade after six years even if the tires have never been used. It turns out most passenger vehicle tires already have a date stamped on them. The date is a small tag placed in the mold and it is formed into the tire sidewall when cured.

These usually have the week of manufacture and the year although some manufacturers might use weeks based on a fiscal year. Here is engineer Jay Wheeler’s response:.

How Old Are Your Tires?