Check tread depth
Ontario passenger vehicles must meet legal minimum tread requirements, but wet and winter performance can decline before a tire reaches the absolute minimum. Measure multiple grooves across each tire rather than checking only one spot.
Inspect condition and wear
Replace or professionally inspect tires showing damage or unsafe deterioration.
- Cords, fabric, deep cuts, or exposed internal material
- Sidewall bubbles or bulges
- Cracking, separation, or repeated pressure loss
- Uneven shoulder, centre, cupping, or bald-spot wear
- Vibration that begins after impact or tire damage
Age also matters
The final four digits of the DOT date code show the week and year of manufacture. For example, 2324 means the 23rd week of 2024. Tire condition, storage, climate, mileage, and manufacturer guidance all affect service life.
Have older tires inspected regularly even when tread remains. Replace immediately when a qualified inspection identifies structural damage or unsafe deterioration.
This guide provides general tire information and does not replace the vehicle placard, owner's manual, tire-manufacturer instructions, legal requirements, or a physical tire inspection.