Our advice: substitute them under 7°C
As soon as the temperature drops below 7 degrees Celsius, winter tyres perform better than normal (summer) tyres. Due to the low temperature, the rubber of a summer tyre becomes harder and hence loses a lot of its good characteristics (grip, comfort). The tyres then lose their grip on the road surface and when you brake it takes longer for you to stop. Generally, winter tyres are fitted in October/November. At higher temperatures, the wear of the winter tyre increases significantly. So as soon as the weather changes from predominantly cold to predominantly warm, you should have your summer tyres fitted again. This is usually around March/April.
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