Winter Car PrepHow Long Do Winter Tires Last?
Tread depth, age, and the signs yours are done — before they fail you.
Winter tires don't last forever, and unlike summer tires, they can look fine while quietly losing the grip you bought them for. Knowing when they're done is a safety question, not a budgeting one.
The short answer: 3 to 5 seasons
A set of winter tires typically lasts three to five winter seasons for an average driver. That works out to roughly 30,000 to 60,000 kilometres of winter driving, depending on how much you drive, how you drive, and whether you run them past the season. Highway commuters wear them faster than city drivers. Aggressive braking and fast cornering wear them faster still. But seasons, not kilometres, are the honest way to think about it — because age matters as much as wear.
Tread depth is the real test
New winter tires start with about 11/32 of an inch of tread. The deep tread and the tiny slits in it — called sipes — are what bite into snow. As the tread wears down, that bite fades. Most tire makers and safety agencies say winter tires lose their real winter performance below about 6/32 of an inch. Below that, they're not much better than all-seasons in snow, no matter what the sidewall says. A tread depth gauge costs a few dollars; a toonie stuck in the tread works in a pinch (if you can see the polar bear's feet, you're getting thin). Check all four tires — uneven wear tells you about alignment or pressure problems too.
Age kills them even with tread left
Rubber hardens as it ages, and hard rubber doesn't grip in the cold — which defeats the whole point of a winter tire. A tire with plenty of tread that's eight years old is not a good winter tire. Check the DOT date code on the sidewall: the last four digits are the week and year of manufacture (so "3221" means the 32nd week of 2021). Most manufacturers suggest retiring tires after six to ten years regardless of tread. If your winters are pushing six years old, start budgeting for a new set even if they look fine.
Signs yours are done
- Cracking in the sidewall or between tread blocks — the rubber is drying out.
- Longer stops on snow than you remember from last winter.
- Uneven wear — bald on the edges (under-inflation) or bald in the middle (over-inflation).
- Vibration or noise that wasn't there before.
Make them last longer
Take them off when winter ends — every warm week on winter tires is wasted tread. Store them clean, cool, dark and dry, stacked flat, away from solvents and electric motors. Keep pressures right all season (cold drops pressure about 1 PSI per 5°C). And rotate them each season so all four wear evenly.
Replace in fours
When it's time, replace all four. Mixing two new winters with two worn ones gives you a car that grips at one end and slides at the other — the worst setup on a snowy road. If you truly can only afford two, they go on the rear, no matter which wheels drive the car. But four is the answer.