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. You can only change the circumference by 5% from that. Seems this change increases it by 3. So if oe tires showed 3 less than real the new ones will be almost spot on.
What is the 3% rule on tires?
As a general rule, you want replacement tires that are within 3 percent of the diameter (height) measurement of the tires originally on your vehicle. Finally, a few tire manufacturers recommend outright tire replacement, as they will not accept repaired tires for warranty consideration or do not endorse repair of V-, Z-, W- or Y-speed rated tires.
What is the 7 7 rule for winter tires?
If you leave them on too long, your winter tires will degrade quickly. So, when is the right time to swap? The rule of thumb is 7-for-7: wait until there are seven consistent days at 7 degrees Celsius. According to auto professionals, you can continue using tires that are out of balance for several months. The recommended average is 2 to 3 months if safety is your main priority.