You can check your tire tread depth using a simple penny test or by looking for built-in wear bars on the tire itself.
The penny test involves inserting a penny into the tire's deepest groove with Lincoln's head facing inward. If you can see the top of Lincoln's head, your tread is likely below the recommended minimum depth of 2/32 of an inch. Alternatively, most tires have small raised bars in the grooves; if the tread is level with these wear bars, it's time for new tires.
Tire condition is just one factor in vehicle safety; regular professional inspections are recommended.
How often should I check my tire tread depth?
It's a good practice to check your tire tread depth at least once a month and before any long road trips. You should also check them after driving through significant road hazards.