How to Calculate Tire Size

Tire shopping can be a bit challenging — especially if it’s your first time. Here’s a breakdown of the terms you should know when buying your next set. Because knowing what to look for will give you peace of mind that you’re buying the right size tire, every time.

Tire width. Traction depends on the width of your tire — a tire too narrow or wide could cause damage, or become a safety risk. It’s best to stick with the size tire your auto manufacturer suggests.

Aspect ratio. The aspect ratio is the length of the sidewall. The lower the sidewall, the better your car will corner — but your ride won’t be as smooth.

Wheel diameter. It’s simple, the size of your tires needs to be the same size as your wheels — no exceptions. If you’d like a different size tire, consider buying a new set of wheels.