What is the 7 7 rule for tires?
The 7 7 rule for tires provides a simple temperature guideline for timing your seasonal tire changes. Install winter tires when daily temperatures drop to 7°C (45°F) or below for seven consecutive days. Remove them in spring after seven straight days above 7°C. When to put on Winter Tires in ONTARIO. Winter Tires are not mandatory in Ontario but the government recommends usage between October 1st and April 30th.