Do car tires have an expiration date? Is the age of a tire really important?

These are questions frequently asked by owners of older cars who often do not drive many kilometers per year and are therefore faced with the dilemma of number of kilometers vs. age of tires.

Even if your tires don't show much wear after a few years on the road, keep in mind that they are only considered "new" up to 5 years from their date of manufacture.

It is therefore good to know the age of your tires without relying solely on a visual inspection of their wear.

What is the DOT code for the tire?

Each tire has a DOT code printed on its sidewall.

DOT stands for Department of Transportation and the code is made up of numbers and letters that indicate the place and date of manufacture of the tire.

Year of production - how can you check the age of the tires?

The abbreviation DOT is followed by numbers that indicate the tire code and factory date, respectively. The production date is indicated by the last three or four digits.

Three digits indicate a production date prior to 2000; the first two digits correspond to the week of production and the last indicates the year. For example, 346 designates the 34th week of 1986 or 1996.

To indicate that the tire was manufactured in the 90s and to distinguish it from products of the previous decade, the triangle symbol is displayed.

This three-digit code was not accurate in terms of decades and for this reason, in 2000, the fourth digit was added and since then, the last two digits represent the year of manufacture.

Example: 2310 means the 23rd week of 2010

Here you can see the marking on a Matador tire produced at Matador AS, Puchov, Slovakia (J3), during the 42nd week of 2008.

How can you check where your tires were manufactured ?

The place of manufacture of a tire is indicated by the expression MADE IN ..., which is also located on the sidewall.

The numbers displayed directly after the DOT code specify the factory that produced the tire.

Below are examples of codes for different factories:

A5 - TC Dębica SA Factory in Debica - Poland
B5 - Michelin factory in Olsztyn - Poland
J3 - Matador AS Factory, Puchov, Slovakia
HW - Barum Plant, Otrokovice, Czech Republic
8C - Firestone French Factory - France

Tire age and legal requirements

European regulations do not impose a consistent policy on the permitted age of tires for sale. Therefore, regulations can vary from country to country.

However, the EU clearly specifies the storage time and conditions for new tires. According to the ETRTO (European Tyre and Wheel Technical Organisation), a tire is considered "new" for 5 years from its date of manufacture if stored under optimal conditions.

Regarding tire lifespan, while a tire sold as new can be used safely for at least 5 to 6 years, it is generally accepted in the industry that tires from major manufacturers should be replaced after 10 years if they are not worn out before then. However, after 5 years of use, tires should be inspected annually.

However, for your safety, it is best to replace your tires after 5 years, even if they are not yet approaching the minimum legal wear rate.

Does the age of a tire matter?

If you have a tire that is 5 years old and you are certain that it has been stored correctly, you can consider it "new".

However, the “newness” of a tire depends on a series of factors such as the quality of the roads driven on, the load, the quality of your car's suspension system, or your personal driving style.

The natural aging process of rubber must also be taken into account.

When storing tires, you can minimize rubber deterioration if you take care of the following conditions:

Light - avoid continuous direct sunlight; the best solution is little or no lighting

Location - keep tires unconstrained in vertical positions (special supports can be purchased to prevent deformation)

Temperature - the best is a constant room temperature without sudden fluctuations

Humidity - tires must be stored in ventilated or air-conditioned rooms

When checking tires to see if they are still safe to use, remember that the main criterion is always the technical condition and parameters of the tire (e.g., tread depth), not just its production date.

Last but not least, when inspecting your car's tires, don't forget to check the spare tire as well. Drivers often forget that spare tires are also subject to wear and tear. In an emergency, it's reassuring to know your car will make it safely home or to the nearest garage.