A person holds a new tire up to a car

New tires are an inevitable expense, but telling when it’s time to get new tires may not be widespread knowledge to all drivers. Conflicting information from friends and family members, from what you read online, etc., may make diagnosing your tire situation a dubious task.

Here are the five telltale signs you should check to determine if you need new tires.

1. Low tire tread depth

To test tire tread depth, insert a quarter upside down into the tread. If it doesn’t cover George Washington’s hairline, it means the tread is less than 4/32 of an inch deep, and it may be time to get new tires. In many states, just 2/32 of an inch is considered the minimum legal tread depth. However, more tread is safer.[1]

2. Tires are old

No matter how rock-solid the tires were when you first purchased them, time can leave its mark. With age, rubber becomes brittle. In addition, the tire’s reinforcing cords can weaken over time. It’s important to know how often to replace your tires. Even if the tread appears intact, most manufacturers advise you to replace your tires after 6 years.

If you look at the side of the tire, you’ll see the manufacturer’s code. The last four numbers here indicate the production date. If this is 3009, for example, it means that the tire was produced in the 30th week of 2009 and it may be time to get new tires. In more severe climates where you may routinely deal with extreme heat, the ultraviolet rays of the sun may impart structural changes in your tires. This may mean that you will have to make the change sooner.[2]

3. Tire sidewall cracking

Look beyond the tread to the sidewall of the tires. Are there any noticeable cuts or grooves? If so, you may be wise to purchase new tires, because these can be signs that a leak is developing or that the tire is weakening and may soon blow out.[1]

4. Bulge in tire sidewall

If the tire has begun to weaken, sometimes the rubber may begin to bulge. This is a red flag, indicating that the tire has begun to fail and may unexpectedly blow out at any time, putting you and your passengers in jeopardy.[1]

5. Vibrations while driving

Has the ride recently seemed very rough or have you noticed vibrations while driving? If so, this can be a sign that your tires are indeed spent, and it’s time to get new ones.[1]

While these tips will help drivers determine whether they need new tires, the best bet is always to take them in to a professional at a local tire or auto shop for an expert opinion. Be prepared for a flat tire, find out how to fix a flat tire and make sure your car insurance provider offers roadside assistance.

Sources:
[1] “Tread Confidently: Know When To Replace Your Tires,” acg.aaa.com/connect/blogs/4c/auto/tread-confidently-know-when-to-replace-your-tires (accessed January 2026).
[2] “9 Signs It's Time to Replace Your Tires,” greatwater360autocare.com/news/9-signs-its-time-to-replace-your-tires (accessed January 2026).
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