You can also switch to your winter tyres when you set your clocks back each autumn. Remember, once the temperatures hit less than 7°C, your summer tyres will be less effective.
It’s important to opt for tyres that are certified for winter driving, as they are made with materials adapted for use in low temperatures (the rubber stays flexible, rather than hardening). The siping on winter tyres guarantees optimal performance in winter conditions. If you have all season tyres with the 3PMSF marking on them, you can keep them year-round instead of replacing them with winter tyres.