According to many state laws tires are legally worn out when they reach 2/32nds” of a remaining tread depth. We do not recommend for our area that you wait that long. Safety is the number one reason to change them at 4/32nd’s”.
You can use a penny to check your tread depths. If Lincoln’s head is covered you know you have more than 2/32nd’s”. If his head shows you need to get new tires. You could also stop by your local tire shop and they will gladly check your tread depths with a more accurate gauge.
Tread depth is only one aspect of knowing when your tires need replacing. Weather checking, dry rot, uneven wear are other factors to consider when deciding on replacing your tires.
Don’t wait until your tires are legally worn out to purchase new tires. With winter approaching it is even more important to have your tires checked. Stop in at your local tire dealer to get your tires checked before the snow starts to fall.