At what depth of tire scratches should the tire be replaced promptly?

[McMarcus]

When the sidewall of a tire is scratched to a depth of about 4 millimeters, it needs to be replaced. This is because the thickness of a car tire is approximately 1 centimeter, and a 4-millimeter scratch is already a serious issue. Driving with such damage can lead to tire blowouts, which is quite dangerous. Below are some tips for tire maintenance: Check tire pressure: Before driving, always check whether the tire pressure is within the normal range. Avoid both underinflation and overinflation, as either condition can cause damage to the tires. Therefore, it's essential to perform these checks before driving. Replace tires: Tires should be replaced regularly once they reach a certain age. If a car has been in use for over two years, or if the tires have traveled between 40,000 to 60,000 kilometers, they should be replaced. Prolonged use can lead to tire aging and more problems. Inspect tires: Regularly check for foreign objects in the tire treads. Since cars often pick up small stones or other debris while driving, it's important to remove any foreign objects promptly to prevent long-term damage to the tires.