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Tire guides

Tire guides.

Short, plain answers to the questions we hear most at the counter.

Stand-in photo

How to read your tire size

The size is printed on the side of every tire, and on a sticker inside the driver's door.

Take 225/65R17 as an example:

  • 225 is the width in millimetres.
  • 65 is the sidewall height, as a percentage of the width.
  • R means radial, which almost every car tire is.
  • 17 is the wheel size in inches.

You may also see a code like 102H after the size. That's the load index and speed rating. When you replace tires, match or beat what your car came with.

When to switch to winter tires

Winter tires are made for cold, not just snow.

Winter tire rubber stays soft and grippy below about 7°C, where all-season rubber starts to stiffen. That's why it's worth switching when the temperature drops, even before the first snow.

Swap season gets busy fast. Book early in the fall, and switch back in the spring once it stays above about 7°C.

The Ontario winter tire insurance discount

Winter tires can lower your car insurance in Ontario.

Since 2016, insurance companies in Ontario have been required to offer a discount to drivers who use winter tires. The amount depends on your insurer.

Ask your insurer about it. They may ask when your winter tires were installed, so keep your receipt.

Tire pressure

The right number is on your door, not on the tire.

  • Use the pressure on the sticker inside the driver's door. The number on the tire's sidewall is the maximum, not the target.
  • Check it once a month with the tires cold, before you drive.
  • Pressure drops in cold weather, so check more often in the fall and winter.

Tread depth and when to replace

Worn tread is what costs you grip in rain and snow.

Tread depth is measured in 32nds of an inch. Most new tires start around 10/32 to 12/32. As tread wears down, the tire has less room to push water and slush away, so it grips less in rain and snow.

Not sure how much is left? Come by and ask us to take a look.

Tire rotation

Moving tires between positions helps them wear evenly.

Front tires usually wear faster than the rears. Rotating them moves each tire to a new position so the set wears more evenly and lasts longer.

Check your owner's manual for how often. Many carmakers suggest every 8,000 to 10,000 km. A seasonal swap is an easy time to do it.

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