Tyre Age and Tyre Expiry Date
Do tyres have expiry dates?Tyres don’t last forever, and old tyres can be a serious safety risk. As tyres age, cracks may form beneath the surface, causing the tyre to fail under load. If you haven’t done so recently, it could be time to check how old the tyres on your vehicle are, and if they need replacing.
Read on to find out how to check the age of your tyres and stay safe on the road.
What happens to old tyres as they age?
Tyres are made of various types of textile, steel and rubber compounds that have properties that evolve over time. As the rubber in a tyre gets older and is exposed to the elements, the strength of the bond between the rubber and the steel belts is reduced. When an old tyre is put under load, cracks in the rubber will begin to form.
These cracks may appear on the tyre’s surface, but they can also appear out of sight within the structure of the tyre. Eventually, the cracking can even cause the steel belts in the tread to separate from the rest of the tyre. Driving on such a tyre is a serious safety risk.
Tyre expiry date
How to tell the age of a tyre?
Check the age of a tyre by looking for the 10 to 12 digit serial tyre identification number, found on the tyre’s sidewall. This identification number is usually preceded by the acronym “DOT”, for example: DOT ELCB DKE 1800.