DOT and Tire Age
Life of a Tire
Based on various sources, a tire can last from 6 to 10 years.
In Europe, where you can drive from 150 kph to limitless speed, most organization there call for a maximum of 6 years lifespan.
In North America, unless you are in hot or coastal region, 10 years is the recommended maximum.
Tire rubber will deteriorate under the sun, especially due to UV light and extreme temperatures. Oxygen will also oxidize the compound. Recent years technologies tend to reduce these effects using chemical and organic oils and composites.
The majority of the manufacturers will honor warranties from date of purchase, not the date of manufacturing (DOT).
Before your purchase
At the all suppliers where PMCtire gets your orders from, the tires are stored in climate controlled warehouses. Under these conditions, rubber aging is slowed.
It is not the case of all local tire merchants.
After your purchase
Conditions under which you will store your tires off-season will determine how fast or slow you tire wil age. Keep them in a cool dry location, away from the sun. For winter tires, remove them from the vehicle as soon as outside driving temperature is over 7 degree celsius. Their compound is made to resist cold but not heat.
It is recommended to have an expert look at your tires once they reach 5 years of usage, including spare tire.
Manufacturing date and DOT
Since 2000, tire have a DOT marking that give manufacturing date and country.
From the last 4 digits, the first two are the manufacturing week and the last two, the year (ex. 0511 would be fifth week of 2011).
A tire should not be sold older than 6 years.
From the manufacturing plant to your vehicle
When you evaluate how old is your tire to determine freshness, you take into account that most were manufactured all over the world, mainly from Asia. Once manufactured, they are warehoused at the plant in containers for a couple of weeks, until a boat can be filled to be shipped.
They will travel the oceans for another couple of weeks to the Montreal port.
Between the boat and the canadian suppliers warehouses there is another few weeks for offloading the boat, port custom clearance, loading the trucks or trains, transport and finally warehousing.
All counting that, the freshest tires sold on the market will be many months old. Often, they will have been manufactured from 4 to 9 months ago.
Choice multiplicity and what it implies
Tires in Canada is 20 000 different products, when we take into account all available sizes from the 1 800+ tire models from the 60 tire manufacturers, that we provide in PMCtire online catalog.
Unfortunately, suppliers will not empty every product line in all sizes every year. Some uncommon models or sizes might stay in stock for a few years before needing restock.
As mentioned earlier, manufacturers’ warranties applies from date of purchase, not the date of manufacturing (DOT).
The best time to purchase a tire
The best time to purchase a tire for availability is from the new stock arrival and the beginning of stock depletion, depending on the season:
Summer / 4-season Tires - Between mid-February & end of April (ideal time in March)
Winter Tires - Between mid-August & end of November (ideal time mid-Sept to mid-Oct)
To obtain more information on your tires, using the DOT, please refer to: