How to Tell If You Need New Tires?

By Erik Culp, Quick Lane Advisor/Manager | Published 12-4-25

When was the last time you checked your tires? If you're not sure, you're not alone but your tires are critical to your safety, fuel efficiency, and overall vehicle performance. At Nelson Auto in Fergus Falls, Minnesota, we're here to help you stay safe on the road with this simple guide on how to know when it's time for new tires.

Whether you're driving to work, heading to the lakes, or just running errands around Otter Tail County, healthy tires make all the difference.

1. Check Your Tire Tread Depth

Your tread helps your tires grip the road especially in Minnesota's icy winters or during summer rainstorms.

How to Check:

  • The Penny Test: Place a penny into the tread groove with Lincoln's head facing down.
        - If you can see all of Lincoln's head, your tread is too worn.

  • Tread Depth Gauge: You can grab one at any auto parts store-or stop by Nelson Auto, and we'll check it for you.

📌 Pro Tip: If your tread depth is below 2/32 of an inch, it's time for a new set of tires.

2. Look for Cracks, Cuts, or Bulges

Over time, Minnesota's changing temperatures, road salt, and potholes can cause tire sidewalls to deteriorate.

Warning Signs:

  • Cracks or dry rot along the sidewall

  • Bulges or bubbles-these can signal internal tire damage

⚠️ If you see any of these issues, visit Nelson Auto ASAP for a free tire inspection.

3. Watch Out for Uneven Tire Wear

Uneven wear could mean poor alignment, suspension issues, or low tire pressure.

What to Look For:

  • Bald spots

  • Tread worn more on one side or in the center

  • Edges wearing faster than the middle

4. Feel Vibrations or Thumping While Driving?

If your vehicle shakes or thumps at certain speeds, it could be:

  • Unbalanced tires

  • A bent rim

  • Internal tire damage

5. Know the Age of Your Tires

Even tires that look fine can be unsafe if they're too old.

How to Check:

Find the DOT code on your tire's sidewall. The last 4 digits represent the week and year the tire was made.
 For example, "3219" means the 32nd week of 2019.

📆 Most tire manufacturers recommend replacing tires every 6 years, regardless of tread condition.

Keeping your vehicle safe starts from the ground up, and your tires play a bigger role than most people realize. If you're noticing any of the signs above, or just want the peace of mind that comes with a professional inspection, we're here to help. At Nelson Auto in Fergus Falls, you can schedule an appointment online at your convenience or stop by our no-appointment-necessary Quick Lane for fast and reliable service. Your safety matters to us. Let our team make sure your tires are ready for every mile ahead.