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Tyre tread depth and legal limit

A tyre is designed to meet performance requirements. But beyond a certain level of wear, it needs to be changed. What is the role of the tread? Up to what level of wear does the tyre remain effective? And what is the legal minimum tread depth for changing your tyres? Find out the answers to all your questions.

The performance of a tyre

The primary functions of a tyre are to carry a load and to allow the vehicle to accelerate, brake and turn. But beyond its functions, a tyre is chosen for the performance you expect from it, which is relative to your use.

It is the way a tyre is designed that will make it perform better under certain conditions than others. And to achieve specific performance, it is the tread that plays a decisive role.

The sculpture's grooves on the tread surface are essential to perform. Depending on their design, they will be more effective in certain conditions, on snow, on dry or wet roads.

The tyre's tread depth also plays a role in performance. For example, it is important for water drainage when driving on wet roads. This ensures that the tyre maintains contact with the ground and postpones the aquaplaning effect to higher speeds.

What is the tread depth of a new tyre ?

This will depend on the tyres and the choice of manufacturer, but here is what is important to know: the tread pattern should be thick enough to ensure a long life for the tyre.

However, if the tread is too deep, it will also consume too much energy during driving, and therefore fuel, because of the heat released by the rubber when it deforms.
This is why the tyre's tread depth is designed by the manufacturer to find the best balance between the life of the tyre and the fuel consumption related to tyres.

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