How to Check Your Tire Tread
You can check your tire tread with a tread depth gauge, the built-in tire wear bars, or a Canadian quarter, but if your tread is worn down to about 1.5 mm or 2/32 inch, the tire should be replaced. Transport Canada says tires worn to the tread wear indicator level must be replaced, and winter tires should not be used near 4 mm or 5/32 inch on snow-covered roads. (Transport Canada)
Quick Tire Tread Guide
Tire tread matters because it helps your vehicle grip the road, clear water, handle snow, and stop safely. Low tread can make your Kia feel less stable in rain, slush, or winter driving.
| Tread Depth | What It Means | What To Do |
|---|---|---|
| 6/32 inch or more | Good tread for most normal driving | Keep checking monthly |
| 5/32 inch | Getting low for winter use | Consider replacement before snow |
| 4/32 inch | Reduced wet and winter grip | Start shopping for tires |
| 2/32 inch | Worn to minimum level | Replace tires |
1. Use a Tread Depth Gauge
A tread depth gauge is the most accurate way to check your tires.
How to do it:
- Park on a flat surface.
- Put the gauge into the main tread groove.
- Check the reading in multiple spots.
- Measure the inner, centre, and outer tread.
- Repeat on all four tires.
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Do not check only one spot. Uneven wear can hide on the inside edge of the tire.
2. Check the Tire Wear Bars
Most tires have small rubber bars inside the tread grooves. These are called tread wear indicators.
What to look for:
- If the tread is still above the bars, the tire has usable tread.
- If the tread is level with the bars, the tire is worn out.
- If one side reaches the bars first, you may have an alignment, suspension, or inflation issue.
Transport Canada says a tire must be replaced when the tread wears even with the tread wear indicator. (Transport Canada)
3. Try the Canadian Quarter Test
A quick home check is the Canadian quarter test.
How to do it:
- Insert a quarter into the tread groove.
- Point the caribou’s nose down into the tread.
- If the nose is covered, you likely still have usable tread.
- If you can see the nose clearly, your tread is getting too shallow.
This is not as precise as a gauge, but it is useful for a quick check before winter or a road trip.
Signs Your Tires Need Attention
Look beyond tread depth. A tire may need replacement even if it still has tread.
| Warning Sign | What It Could Mean |
|---|---|
| Cracks or dry rot | Aging rubber |
| Bulges or bubbles | Internal tire damage |
| Uneven tread wear | Alignment or suspension issue |
| Vibration at speed | Tire balance or damage |
| Pulling to one side | Alignment, tire, or pressure problem |
Final Thoughts
Check your tire tread at least once a month and before long drives. In Ottawa, tread depth matters even more because rain, snow, slush, potholes, and cold weather all affect traction.
If your tires are close to the wear bars, unevenly worn, cracked, bulging, or poor in winter traction, it is time to have them inspected. Kia 417 can help with tire checks, seasonal tire changes, and replacement options. You can browse Kia 417’s new Kia inventory, view available new car specials, or use the contact page to ask about service, tires, or appointment availability.
