How often should tires generally be replaced?

Tires should generally be replaced at least every 5 years because over time, even if there is no visible damage, the materials in tires can degrade due to environmental factors such as UV exposure, temperature changes, and road conditions. This aging process can compromise the tire's performance and safety characteristics, including grip and resistance to blowouts.

While some tires may last longer than 5 years, it is a widely accepted guideline to inspect tires for signs of wear and degradation regularly. Additionally, tires that are more than 5 years old should be examined closely by a professional for any potential issues and assessed for replacement, regardless of tread wear.

The other options suggest shorter or specific conditions for tire replacement, which may not take into account the overall safety and performance of the tire as it ages. Regular maintenance and monitoring are essential to ensure safe driving conditions.