What is the 7 degree Celsius rule of winter tyres?

by Editor News

Winter tyres are high performance tyres which are specially designed to provide firm grip while driving on snow, ice or wet surfaces in cold weather. In countries which receives moderate to high level of snowfall, driving on snow with normal tyres can not only degrade the performance of the vehicle but can also pose serious safety concerns.

Winter tyres are made up of soft and highly flexible rubber compounds which provides maximum grip on the snow. These tyres also have deep tread patterns with grooves so as to provide smooth movement and preventing the vehicle to slip on the surface. Winter tyres reduces the braking distance whereas, using summer tyres on snow increases it as the vehicle needs longer duration to come to standstill.

Experts say that when the temperature falls below 7 degrees C it is time to change your summer tyres to winter tyres. The reason for this lies in the construction of these tyres. These tyres are especially designed to provide more traction on irregular pavements. This job can only be done by soft tyres and summer tyres tend to harden with the fall in temperature. Winter tyre has deeper treads so as to maximise the grip on the road, whereas, summer tyre loses its grip as the temperature decreases.

Additional support is provided to the tyre by various sipes in the treads blocks which open up on watery pavements, taking in water and drying the area, and letting out the water from the back of the tyre while rotating. There are also open areas on a winter tyre which presses against the snow that sticks to it and later is thrown back while rotating, cleaning the path for smooth rotation. So if you are travelling on a snowy path, look for a tyre with deeper treads and if the terrain is icier look for tyres with more sipes.

These are some of the advantages of using winter tyres under 7 degrees C:

  • Reduces braking distance as compared to summer tyres.

  • More fuel efficient as they provide smooth movement on the road.

  • Soft and flexible rubber provides more control and traction.

  • Sipes help in absorbing water, providing les slippery path.

  • Doesn’t harden at low temperatures, proving smoothness.

  • Presses against the snow and pushes it backwards, clearing the path.

  • Non-studded and non-spiked tyres does not damage tarmac on the road.





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