When to Replace Tires Tread Depth?

The U.S. Department of Transportation recommends replacing tires when they reach 2/32”, and many states legally require tires to be replaced at this depth. The idea of the penny test is to check whether you've hit the 2/32” threshold.

Should I replace my tires at 4 32?

6/32" or higher: Your tire's tread depth is sufficient. 5/32": If snow-covered roads are a concern, you should consider replacing your tires. 4/32": If you frequently drive on wet roads, consider replacing your tires. ... 2/32" or lower: Your tires are legally bald, and it's time to replace them.

Should I replace tires at 3mm?

Make sure you check your tread depth a few times a year for your own safety and peace of mind, and remember that the 1.6 mm minimum allowed tread depth is merely a legal limit. For safe driving, tires must be replaced at 3 or 4 mm remaining tread depth.