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Tire Guide · Updated June 2026 · Chatham-Kent, Ontario

How to Find Your Tire Size (3 Easy Ways)

It takes about a minute and you don't need any tools. Your tire size is printed in two or three places on your vehicle — here's where to look, and what every number in that code actually means so you can shop with confidence.

Almost everyone who calls the shop unsure what they need just hasn't been shown where to look. Once you've seen it, you'll never forget it. Here are the three places it lives.

1.The driver's door-jamb sticker

Open the driver's door and look at the frame (the body panel the door latches into) or the edge of the door itself. There's a sticker there with your vehicle's recommended tire size and the correct air pressure. This is the best source because it's the size your vehicle was built for, straight from the manufacturer.

2.The tire sidewall

Look at the outside of any current tire. You'll see a string like 225/65R17 moulded into the rubber. That's your size. One catch — if a previous owner or shop put the wrong size on, the sidewall tells you what's on the car, not necessarily what should be. When in doubt, trust the door-jamb sticker.

3.The owner's manual (or glovebox)

The manual lists the factory tire size, and many list the optional sizes too. Handy if the sticker's worn off or you can't get to the door easily. No manual? A quick call to us with your year, make, model and trim and we'll look it up.

What the Numbers Mean

Here's that 225/65R17 code broken down — read it left to right:

225 / 65 R 17 Width 225 mm across Aspect ratio sidewall = 65% of width R radial Wheel diameter 17 inches

You'll sometimes see a couple more characters after it, like 225/65R17 102H — the 102 is the load index (carrying capacity) and the H is the speed rating. Both should meet what your vehicle calls for; we cover them in tire terms decoded. For shopping, the main size (225/65R17) is what you need.

Got your size? You're ready to shop. Punch it into our catalogue to see what's in stock and what it costs, or read it to us over the phone and we'll price a set — new or budget — and book the install. All four installed for $25 a tire here in Pain Court.

Frequently Asked Questions

Where is the tire size on my car?

Three places: the sticker on the driver's door jamb (best source), the sidewall of your current tires (like 225/65R17), and the owner's manual. The door-jamb sticker is the most reliable because it's the factory-recommended size.

What if all four tires show different sizes?

That shouldn't happen on a normal vehicle and usually means someone fitted the wrong tires. Go by the door-jamb sticker, and give us a call — mismatched sizes can affect handling and, on AWD vehicles, damage the drivetrain.

Can I put a different size on my car?

Sometimes, within limits (a "plus size" that keeps the overall diameter close). But going outside the safe range throws off your speedometer and can cause rubbing or clearance problems. Check with us before changing sizes — it's an easy thing to get wrong.

I still can't find it — can you help?

Absolutely. Give us your year, make, model and trim and we'll look up the factory size in seconds. That's a normal phone call for us, no problem at all.

The Bottom Line

Your tire size is on the door-jamb sticker and the sidewall — about a minute to find, and the code (225/65R17) is just width, sidewall height, radial, and wheel diameter. Once you've got it, you're ready to shop or call for a price. And if you can't find it, that's what we're here for.

Found Your Size? Let's Price It.

Shop online with your size, or read it to us and we'll price a set and book the install — new or budget, your call.