How to Read and Understand Your Tire Size for Alberta Roads and Winters
If you’ve ever looked at your tire and seen a mix of letters and numbers like P255/45R20, you might have wondered what it means. You’re not alone. The good news is, you don’t need to be a tire expert to understand the basics. Knowing how to find and read your tire size can help you shop with confidence and keep your vehicle running safely.
Where to Find Your Tire Size
The easiest way to find your tire size is to look at the sidewall of your tire. You’ll see a code that looks like this: P255/45R20.
You can also find the recommended tire size for your vehicle on a sticker inside the driver’s side door. This is the manufacturer’s suggestion and is a reliable reference if you’re ever unsure.
What the Numbers and Letters Mean
Here’s a simple explanation of what that code tells you:
The first letter is about the type of vehicle. Most passenger cars use a tire that starts with a “P”. Trucks and SUVs may have “LT” for light truck.
The first number is the width of the tire. It’s measured in millimeters, but all you really need to know is that this number helps make sure the tire fits properly and drives the way it should.
The number after the slash tells us about the height of the sidewall. You don’t need to calculate it — just know it helps match your vehicle’s handling and ride comfort.
The “R” stands for radial, which is the type of tire construction used on nearly all modern vehicles.
The last number is the wheel size in inches. For example, if it says “20” then your tire fits a 20-inch wheel.
Sometimes you’ll see more numbers and letters after that. These refer to how much weight the tire can carry and the maximum speed it’s designed for. If you ever need help with those, our team can explain what’s right for your vehicle.
Why Tire Size Matters
The right tire size helps your vehicle handle properly, keeps your speedometer accurate, and improves overall safety. It also helps prevent uneven wear and can even affect fuel economy.
If you’re switching between summer and winter tires, replacing a worn set, or buying an upgrade, using the right size makes a big difference.
Need Help with Tires?
At Drayton Valley Quick Lane, we can help you check your current tire size, confirm the recommended size for your vehicle, and go over the best tire options for your needs.
You don’t need to figure it out on your own. We’re here to make it simple.
Book a tire service appointment.
You can walk in anytime of course, but booking ahead saves time and ensures we’re ready for you.
Prefer to speak with someone? Give us a call at 780-542-2025 and we’ll be happy to help.