What is the 7 7 rule for tires?
The 7-7 rule says if temperatures consistently drop below seven degrees celsius for more than seven days, you should put winter tires on your car. The 7’7 rule is a practical guideline embraced by many drivers to determine the optimal time for switching between winter and summer or all-season tires. It suggests waiting for seven consecutive days where the daily average temperature remains below 7°c (about 45°f) before installing winter tires.