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. Cons: compromised traction: may struggle in heavy snow or severe winter conditions, as they aren’t explicitly designed for such situations. Shorter lifespan: compared to dedicated winter or summer tires, all-weather tires might wear out faster when exposed to extreme temperature fluctuations.While a set of all-season tires can offer some traction in light snow and the occasional winter storm, they’re not designed for deep snow, ice, and cold weather (when temperatures stay below ~45º F).
What is the 3% rule for tires?
The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy. The 3% rule says that your new tire’s total outside diameter should not change by more than ±3% compared to your current tire. If the increase or decrease is bigger than 3%, you risk problems like: Tire rubbing the frame or fork.