Studded Tires: Everything You Need to Know

August 14, 2026

Every Ontario winter brings the same question from drivers looking to maximize their traction on ice: should I go with studded tires? It's a reasonable thing to wonder, but if you're driving in Mississauga or anywhere else in Southern Ontario, there's a very important legal reality you need to know before you even shop. Here's a complete breakdown of what studded tires are, how they work, whether they're worth it, and exactly what the law says in Ontario.

What Are Studded Tires?

Studded tires are winter tires with small metal pins, called studs, embedded directly into the tread. Each stud protrudes roughly 1–2 mm from the tire's surface, and a single tire typically contains 80 to 100 of them, depending on the size.

The idea is straightforward: when a regular winter tire relies on its rubber compound and tread pattern alone to grip snow and ice, a studded tire adds a physical "claw" that bites into frozen surfaces. As the tire rotates, the studs chip into packed ice and hard-packed snow, increasing grip in a way that even the best studless winter tire can't quite match on pure glare ice.

That said, studs only have an advantage on ice. On dry pavement, wet pavement, or loose snow, the studs actually reduce the rubber's contact with the road surface and can increase braking distances. This is worth keeping in mind when evaluating whether they're the right choice for your driving conditions.

Are Studded Tires Legal in Ontario?

This is where many drivers get caught off guard, and where Ontario's rules are genuinely complex.

In short: studded tires are illegal in Southern Ontario.

Here's exactly how the law breaks down under the Ontario Highway Traffic Act:

Studded tires are permitted only in Northern Ontario, specifically in the districts of Algoma, Cochrane, Kenora, Manitoulin, Nipissing, Parry Sound, Rainy River, Sudbury, Thunder Bay, and Temiskaming.
Within those regions, studded tires are allowed from October 1 to April 30 each year.
To use studded tires legally, the driver must be a resident of Northern Ontario, own a business registered in Northern Ontario, or represent a school, road authority, or municipal organization operating in Northern Ontario.
Southern Ontario drivers, including anyone in Mississauga, Toronto, the GTA, Hamilton, Ottawa, or London, are not permitted to use studded tires. Fines for non-compliance can reach up to $1,000.
There is a limited exemption for out-of-province visitors: drivers from other provinces or the US who are passing through Ontario may use studded tires for up to 30 days.

If you're one of our customers in Mississauga or the surrounding area, the bottom line is clear: studded tires are not a legal option for your vehicle. Quality winter tires with a three-peak mountain snowflake (3PMSF) rating are the right choice for Southern Ontario roads, and they perform very well on the conditions you'll actually encounter here.

When Do Studded Tires Have to Come Off?

For drivers in the eligible Northern Ontario regions, studded tires must be removed by April 30 each year. Using them after that date puts you outside the law, even if there's still a late-season snowfall.

The reason for the deadline isn't arbitrary. Studded tires cause measurable wear to road surfaces, the metal pins gradually erode asphalt, particularly on dry pavement. Once winter conditions ease and bare roads become the norm, the damage studs do to pavement outweighs the traction benefit they provide. Modern studs approved under Ontario regulations are "Scandinavian-standard" lightweight studs, which have been shown to reduce road damage significantly compared to older, heavier designs — but they still cause more wear than a rubber-only tire on dry surfaces.

Must Read: How Often Should You Rotate Tires? A Complete Guide for Canadian Drivers

Are Studded Tires Worth It?

For Northern Ontario drivers who regularly contend with sustained icy conditions, extreme cold, and roads that may not be treated as frequently as urban highways — yes, studded tires can be genuinely worth the investment.

Here's where they deliver real value:

Glare ice and wet ice: This is studded tires' strongest advantage. On a frozen lake road or a sheet of freezing rain, studs provide a measurable grip advantage over even the best studless winters.
Rural northern roads: Less-frequently sanded or salted routes benefit most from the additional mechanical grip studs provide.
Peace of mind in severe conditions: For drivers who regularly travel remote stretches in deep winter, the added security is a practical safety benefit.

Here's where they fall short:

Dry or wet pavement: Studs reduce rubber-to-road contact, which means longer braking distances and less predictable handling on bare surfaces.
Cost: Studded tires run approximately $100 to $300 per tire higher than comparable studdless winters, and that's before installation.
Noise: The metal studs create a distinct clicking at low speeds and a hum at highway speeds that some drivers find noticeable.
Legal restrictions: As detailed above, they're outright illegal for most Ontario drivers.

For the vast majority of Ontario drivers in the south, where roads are treated frequently and conditions alternate between snow, slush, and dry pavement, a high-quality studless winter tire is a better all-round choice. It'll outperform a studded tire on wet and dry surfaces, handle variable conditions more predictably, and keep you fully within the law.

How to Replace Tire Studs?

If you're a Northern Ontario driver with a set of older studded tires and you've noticed studs missing or worn down, here's what you need to know: individual stud replacement is generally not recommended by tire manufacturers.

Here's why. The pre-drilled stud holes in a tire are precision-sized for new studs at the point of manufacture. Once a tire has been driven on, those holes can pick up small debris — gravel, grit, road material, that compromises the seating of a replacement stud. A poorly seated stud can work loose, which creates a safety hazard and defeats the purpose of having studs in the first place.

Nokian, one of the leading manufacturers of studded winter tires, specifically advises against replacing individual worn studs. Their position is that a tire with missing or worn studs has lost its primary safety advantage and should be replaced as a set rather than patched up stud by stud.

If your studded tires are losing studs regularly, treat it as a sign that the tires are reaching the end of their service life. Have a qualified technician inspect them and advise on whether a new set makes sense, and if so, have the studs factory-installed in the new tires before they've touched the road.

Important note: "Tire studs" and "wheel studs" (the threaded posts that hold your wheel to the hub) are two entirely different things. If it's a wheel stud, one of the bolts your lug nuts thread onto, that needs replacing, that's a separate mechanical repair that should be handled by a licensed technician promptly, as a damaged or missing wheel stud is a safety issue regardless of season.

The Bottom Line for Southern Ontario Drivers

If you're driving in Mississauga, the GTA, or anywhere else in Southern Ontario, studded tires simply aren't a legal option, and in most practical cases, they wouldn't be the right tool for the job anyway. The variable road conditions in southern Ontario (treated highways, mixed precipitation, dry spells between storms) suit a premium studless winter tire far better.

What matters for your winter safety is having quality winter tires installed before the cold hits, mounted on properly maintained wheels, and swapped off again in the spring before they wear prematurely on warm asphalt.