A new AAA study finds that 30% of vehicles on American roads have at least one tire worn below safe levels, contributing to 11,000 tire-related crashes annually. Here's how to check yours.
The Penny Test Is Outdated
Experts now recommend the quarter test instead. Insert a quarter into tread grooves — if you can see the top of Washington's head, your tires need replacement. The old penny test allows tires to be driven too long.
Warning Signs
- Visible wear bars flush with tread surface
- Vibration at highway speeds
- Uneven wear across the tread
- Cracks or bulges in sidewalls
- Tires older than 6 years regardless of tread
Replace tires in sets of two minimum, ideally four, and always put new tires on the rear axle regardless of drive type.
