1. Your Tread Depth Is Below the Legal Limit

The number one sign you need a tire change? Worn-out tread. In Alberta, the legal minimum tread depth is 1.6 mm. But experts recommend changing tires when tread depth falls below 3 mm for summer tires and 4 mm for winter tires. Why? Because reduced tread compromises traction, especially in Calgary's snow, slush, or rainy conditions.

Quick Tip:

Use the "toonie test": insert a $2 coin into your tire tread. If the silver part is fully visible, it's time for a replacement.

2. Cracks, Bulges, or Cuts in the Sidewall

Extreme Calgary temperatures — from winter cold snaps to summer heat waves — can cause rubber to degrade. If you notice cracks, bulges, or deep cuts in your sidewalls, your tires are likely compromised. These weak points can lead to blowouts, especially at highway speeds.

Don’t Ignore:

• Bubbles or blisters on the outer surface

• Visible cords or fabric in the rubber

• Deep abrasions after hitting a curb or pothole

3. Vibration or Thumping While Driving

A steady vibration or rhythmic thumping sound might not be your suspension — it could be your tires. Worn, uneven, or damaged tires can throw off your car’s balance and alignment, creating a bumpy, unsafe ride.

Possible Causes:

• Tire separation (the rubber layer starts to peel apart)

• Flat spots from prolonged parking

• Internal damage from potholes or debris

If you’re feeling vibrations in the steering wheel or seat, it’s time to inspect your tires immediately.

4. You’re Getting Worse Fuel Economy

Noticing more frequent trips to the pump? It could be your tires. Worn-out or under-inflated tires reduce fuel efficiency. Calgary’s hilly terrain and long commutes mean that any drop in performance adds up quickly in fuel costs.

Check For:

• Low tire pressure (especially during cold snaps)

• Misalignment or uneven wear

• Tread depth issues that force your engine to work harder

5. It’s Been Over 6 Years Since Your Last Change

Even if your tread looks okay, age still matters. Rubber deteriorates over time. Tire manufacturers recommend replacing tires every 6 years, regardless of use. In Calgary, where road salt, freeze-thaw cycles, and UV exposure are constant, tires may wear out faster.

Look for the DOT Code:

You can find the manufacture date on the tire sidewall. It looks like: DOT XXXX XXXX 3018 (meaning the 30th week of 2018).

If your tires are more than 6 years old, it’s time to upgrade.

6. Seasonal Change Is Around the Corner

Calgary weather can flip in a flash. If you’re still running summer tires into fall or delaying your winter swap until the snow falls, you're taking unnecessary risks. Winter tires are designed for cold temperatures and icy roads. Summer and all-seasons lose grip below 7°C.

Signs You Need a Seasonal Change:

• You’re skidding at stops or slipping around corners

• Your summer tires are hard or cracked from cold

• The first frost warning has already hit

Being proactive can prevent accidents, costly repairs, and last-minute panic bookings.

Why It Matters in Calgary

Calgary’s unique weather patterns mean your tires wear out differently than in milder cities. You might face dry pavement, sleet, and black ice all in the same week. Staying on top of your tire health is a critical part of vehicle maintenance here.

Risks of Ignoring Tire Wear:

• Longer braking distances

• Higher chances of hydroplaning

• Reduced cornering control

• Potential fines if your tread depth is illegal

Your tires are your only contact with the road — don’t gamble with worn rubber.

What To Do Next

If you’ve noticed any of the six signs above, it’s time to schedule a tire change.

Here’s what you can do today:

1. Check your tread with a coin test

2. Inspect for cracks, bulges, and wear

3. Book a professional tire check or mobile service

You don’t need to wait in a shop for hours anymore. Services like mobile tire changes in Calgary make it simple to get safe, road-ready tires without the hassle.

Final Thoughts: Don’t Wait Until It’s Too Late

Tires don’t last forever, especially not in Calgary’s tough conditions. From worn tread to seasonal tire changes, the signs are often right in front of you. Regular inspections, proactive swaps, and timely replacements keep you safer and save you money long-term.

Don’t wait until you're stuck on Deerfoot Trail with a flat. When in doubt, change them out.