All-Weather vs All-Season Tires: Which Is Right for New Brunswick?

All-season tires are effectively summer tires with a longer name and are not built for real winter. All-weather tires carry the 3PMSF winter certification and can legitimately run year round. Two dedicated sets still beat one set, but if you only want one, all-weather is the one.

The naming is the whole problem. All-season sounds like it covers all four seasons in Canada. It does not, and the industry has never fixed the label.

What is the difference between all-weather and all-season tires?

The difference is certification. All-weather tires carry the three-peak mountain snowflake symbol, meaning they passed a standardised winter traction test. All-season tires do not. An all-season carries at most an M+S marking, which is a tread pattern description rather than a tested performance standard.

This is one of the questions we answer most at the counter, and the answer surprises people every time: all-season and summer tires are basically the same thing. That is the part nobody tells you when you buy them. For summer driving, all-season is exactly what we recommend and it does the job well. But if you want one set of tires to run all year, all-weather is the better bet, because all-season is not really all-season. What we actually recommend for anyone driving in Canada is two sets, winter tires for winter and summer or all-season for the rest of the year.

Side by side

Are all-season tires good enough for a New Brunswick winter?

No. Their rubber compound stiffens as temperatures drop, and a stiff tire cannot conform to the road surface, which is what generates grip. On a cold Fredericton morning an all-season is working against you before there is any snow on the ground at all.

The Government of New Brunswick's own winter driving guidance is direct about it: install four snow tires and do not depend on all-season tires. (Government of New Brunswick, Winter Driving Safety)

It is about temperature, not snow

People wait for the first snowfall to change tires. The compound difference shows up in cold, dry conditions too. Braking distance on a cold, clear road is longer on a stiffened all-season than on a winter tire, and that is before you add ice, slush, or a hill.

When does one set of all-weather tires make sense?

When the practical reality of your life beats the theoretical best setup. If you have nowhere to keep a second set, do not want to change tires twice a year, or drive low annual kilometres mostly in the city, a certified all-weather set is a genuinely reasonable choice and far better than running all-seasons through winter.

All-weather is the right call if

• You want one set on the vehicle all year, full stop
• You do a modest number of kilometres, mostly around town
• You will not realistically make it in for two changeovers a year
• You need certified winter capability without running two sets

Two sets is still the right call if

• You drive the highway regularly in winter
• You commute in and out of Fredericton in all conditions
• You want the shortest stopping distance available when it is genuinely icy
• You want maximum life out of both sets, since each only runs half the year

Running two sets is not just about grip. Each set only wears for half the year, so both last longer, and a summer tire is not being cooked in July while a winter compound is not being destroyed by August heat.

What should you look for when buying tires in Fredericton?

Look for the 3PMSF snowflake if the tire will see winter, match the load index and speed rating your vehicle calls for, check the build date on the sidewall, and buy four matching tires rather than mixing types across the axles.

The four checks before you buy

1. 3PMSF snowflake: if it will run in winter, it needs the symbol
2. Load index at or above factory spec: never lower
3. Build date: check the last four digits of the DOT code, and avoid tires already several years old on the shelf
4. Four matching tires: mixing tire types front to rear causes uneven grip and uneven braking

That last one is not a preference. Different tires on different axles means one end of the car gets grip before the other, and on an all-wheel-drive vehicle mismatched rolling diameters put real strain on the drivetrain.

Key takeaways

• All-season tires are closer to summer tires than to winter tires, despite the name.
• All-weather tires carry the 3PMSF snowflake and can legitimately run year round.
• The best setup for New Brunswick is two sets: winter for winter, summer or all-season for the rest.
• If you only want one set, all-weather is the right choice, not all-season.
• The 3PMSF snowflake, not an M+S marking, is the mark of tested winter capability.
• Whatever you choose, run four matching tires.

Frequently asked questions

Are all-season tires good enough for winter in New Brunswick? No. All-season tires do not carry the 3PMSF winter certification and their rubber compound stiffens as temperatures fall, which costs you grip on cold, wet, and icy roads. They are a summer and shoulder-season tire. For a New Brunswick winter you want winter tires or, at minimum, certified all-weather tires.

What is the difference between all-weather and all-season tires? All-weather tires carry the three-peak mountain snowflake symbol, meaning they passed a winter traction test, so they can legally and practically run through winter. All-season tires do not carry it. Despite the name, an all-season tire is closer to a summer tire than to a winter tire.

Can I just run all-weather tires year round? Yes, that is what they are designed for, and if you want a single set it is the right choice. The trade-off is that an all-weather tire is a compromise at both ends. It will not match a dedicated winter tire in deep cold and it will wear faster in summer heat than a true summer tire.

How do I tell if my tires are winter rated? Look on the sidewall for the three-peak mountain snowflake symbol, a small pictogram of a mountain with a snowflake inside it. That is the certification. An M+S marking on its own is not the same thing and does not mean the tire passed any winter test.