What is the 3% tire rule?
The 3% tire rule is a guideline for upsizing tires. It recommends keeping the new tire’s diameter within 3% of the original to avoid affecting performance and safety. 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.
What is the 20p tire trick?
Insert a 20p coin into your tyre’s tread grooves; if the outer band is visible, your tyres are below the legal limit and MUST be replaced. The legal minimum is 1. The 20p Test Insert a 20p coin into the lowest tread depth of your tyres. If you can’t see the outer rim around the edge of the coin, then your tyre is safe and has a minimum of 3mm tread depth. If you CAN see the rim then your tyre tread is less than 3mm and should be checked by a professional.
What is the 5 year tire rule?
While there’s no hard-and-fast rule, and no federally mandated safety guidance on when a tire should be (ahem) retired, many carmakers and experts advise replacement between five and six years from the manufacturing date. We recommend replacing tires aged 6-10 years, no matter how much tread remains. When it comes to replacing tires, things can be a little unpredictable. Mileage, condition and routine maintenance all contribute to the tire’s safety and usability.Discount Tire recommends replacing your tires at 6 years of age, regardless of how much tread is left. For your safety, Discount Tire will not service a tire that exceeds 10 years of age.The National Highway Traffic Safety Administration (NHTSA) and the Tire Manufacturers Association suggest that a tire is only 100% safe to use until it turns 5 years old. However, some admit that a tire can be operable for up to 10 years if you check it for issues annually, especially after the fifth year.As tires age, they are more prone to failure. Some vehicle and tire manufacturers recommend replacing tires that are six to 10 years old, regardless of treadwear.