Straight answers, before the first freeze.
What Ontario actually requires, when to make the switch, what a set costs, and how the insurance discount really works. Twenty-five guides for Greater Toronto Area drivers, with the sources linked.
Are winter tires mandatory in Ontario?
No, Ontario does not require winter tires. Here is what the law says, how the insurance discount works, and when GTA drivers should switch.
When should you put winter tires on?
Switch on temperature, not snow. The 7 C rule, first-snow timing, and insurer deadlines for GTA drivers.
How long do winter tires last?
Four to six seasons, but tread and age decide. When to replace winter tires, and how to check.
Are all-season tires good enough for a GTA winter?
Fine for light snow, out of their depth on ice. The 7 C rule, a 30% longer stop, and all-season vs all-weather vs winter.
Do winter tires lower your car insurance?
Ontario is the only province that requires a winter tire insurance discount. Who qualifies, the dates that count, and how to claim about 2 to 5 percent.
When do you switch to winter tires? A GTA timeline
Go by the thermometer, not the calendar. The 7 C rule, a month-by-month GTA timeline, and how early to book to beat the rush.
Are all-weather tires good for winter?
All-weather tires carry the 3PMSF snowflake and work year-round, but a dedicated winter tire still wins on ice and in deep cold.
How much do winter tires cost in the GTA?
A mid-range set of four runs about $500 to $800, roughly $860 to $1,360 all-in with rims and install. What drives the price and how to pay less.
All-weather vs winter tires: which should you buy?
Winter tires win on deep cold, ice and the insurance discount; all-weather wins on year-round convenience. How GTA drivers should choose.
Are studded tires legal in Ontario?
Studded tires are legal only in Northern Ontario, Sept 1 to May 31. The GTA and the rest of the south cannot use them. Here is the rule and what to fit instead.
What does M+S mean on a tire?
M+S means mud and snow, a tread-design label, not tested winter grip. The 3PMSF snowflake is the marking that certifies a real winter tire.
How much does a tire change cost in the GTA?
A seasonal tire change is about $80 to $160 a set loose, or $40 to $80 on rims. What shops charge and how a second set of rims cuts the cost.
When should you take winter tires off?
Take winter tires off once highs stay above 7 C, usually around April, and after your insurer's window. Plus how to store them so they last.
Can I use winter tires in summer?
Legal in Ontario, but winter tires wear up to 60 percent faster in the heat, stop longer and use more fuel. Take them off in spring instead.
All-season vs winter tires: the difference on ice
Below 7 C, all-season rubber hardens while winter grips. Winter tires stop up to 30 percent shorter on ice. The difference that matters for a GTA winter.
Best winter tires in Canada for 2026
No single winner, only category leaders. The top-rated Canadian winter tires for 2026, from best overall to best value, ice, SUV and all-weather.
How much are 4 tires at Costco?
The real total for four winter tires at Costco, what the install includes, and how joining a cohort with other GTA drivers compares.
Tire size meaning: how to read your sidewall
Decode the six parts of your tire size, find your factory size, and buy winter tires that actually fit.
Studded vs non-studded winter tires
The honest studded vs studless comparison, the Ontario rule that decides it, and what most GTA drivers choose.
Why are winter tires so expensive?
Why winter tires cost more to make, where the real savings are, and how joining a cohort with other GTA drivers gets you a fair price on a good set.
Winter tires with rims or without?
The real GTA cost math on a second set of steel winter rims versus remounting one set each season, and when each option makes sense.
Tire pressure for winter tires in the cold
Set winter tire pressure to the door-jamb placard, not the sidewall maximum. Why cold air drops your PSI, how to find your number, and how often to check.
Winter tire storage: how to store them right
How to store winter tires the way tire makers advise: cool, dark, off the floor, stacked flat or hung on rims, upright off the rims. Plus paid-storage advice.
Tread depth tire chart for winter tires
A winter tire tread depth chart, from 12/32 inch new to the 4/32-inch replace point and the 2/32-inch legal limit, plus the Canadian coin test.
Tire rotation pattern: how often to rotate
How often to rotate winter tires and the correct pattern for your drivetrain: forward cross for front-wheel drive, rearward cross for rear and all-wheel drive.