What are the criteria for tire replacement?

[Duncan]

The standard for tire replacement is the degree of wear on the tire surface. When the tread depth on the tire surface is below 1.6mm, the owner must replace the tires as soon as possible. Continuing to drive under such conditions can easily lead to the risk of a tire blowout. During daily vehicle use, if the tread depth is greater than 1.6mm but there are visible cracks on the tire surface or bulges on the tire sidewall, the owner should replace the tires immediately, regardless of how long the tires have been in use. Generally, the service life of tires from different brands ranges from 3 to 5 years. After 5 years, tires almost always show significant signs of aging and hardening. Therefore, it is recommended that owners replace their tires regularly to avoid unpredictable dangers. Thus, when the wear on the tire surface poses a safety hazard, the tires should be replaced promptly.