On average, you need new tires every 6 years or between 36,000 and 75,000 miles, though this varies based on factors like driving habits, climate, and tire type

. Tires degrade over time even if unused, so they should never be used beyond 10 years regardless of tread condition

. Key indicators for replacing tires include:

• Tread depth worn below 2/32 of an inch (the legal minimum in many places)

. You can check this using a quarter or penny test.

• Tires older than 6 years, even if tread looks good, due to rubber degradation and risk of cracking or blowouts

• Changes in tire performance such as loss of traction, frequent air pressure loss, vibration, or steering issues

• Mileage thresholds typically range from 25,000 to 50,000 miles for many tires, but some can last up to 100,000 miles depending on type and maintenance

For all-wheel drive vehicles, it is often recommended to replace all four tires at once to avoid drivetrain issues

. Proper tire maintenance, including correct inflation and regular inspections, can help extend tire life but will not prevent aging-related replacement needs

. In summary, plan to replace tires roughly every 6 years or when tread is worn, and never use tires older than 10 years for safety