Tire Sizes by Wheel Diameter – Database

What do the numbers on my tire sidewall mean?

The numbers on your tire sidewall contain important information about the specifications and characteristics of your tire. Here’s a breakdown of what those numbers generally represent:

How do I determine the correct tire size for my vehicle?

The correct tire size for your vehicle can usually be found in your vehicle’s owner’s manual or on a placard located on the driver’s side door jamb or inside the glove compartment. You can also consult with a professional tire dealer or mechanic for recommendations based on your specific vehicle make and model.

Can I use a different tire size on my vehicle than what’s recommended in the owner’s manual?

It is generally recommended to use the tire size that is specified in your vehicle’s owner’s manual or on the placard. Using a different tire size may affect your vehicle’s speedometer accuracy, handling, and overall performance. It is best to consult with a tire professional for expert advice.

What does the aspect ratio mean in a tire size?

The aspect ratio in a tire size refers to the height of the tire’s sidewall as a percentage of its width. For example, in the tire size P215/65R16, the aspect ratio is 65, which means the height of the tire’s sidewall is 65% of its width.

How does changing the tire size affect my vehicle’s performance and fuel efficiency?

Using a larger tire size may result in a higher speedometer reading, reduced acceleration, and increased fuel consumption. Conversely, using a smaller tire size may result in a lower speedometer reading, improved acceleration, and potentially reduced fuel efficiency. It is important to select the appropriate tire size for your vehicle based on manufacturer recommendations.

Can I use a smaller tire size for winter driving?

Using a smaller tire size for winter driving is not recommended, as it can negatively impact your vehicle’s handling, traction, and stability. It is best to use the tire size specified by the vehicle manufacturer for optimal performance in winter driving conditions.

Can I mix tire sizes on my vehicle, or do all four tires need to be the same size?

It is generally recommended to use four tires of the same size and type on a vehicle to maintain consistent handling, stability, and performance. Mixing different tire sizes may result in uneven wear, reduced traction, and potentially unsafe driving conditions. However, in some cases, tire manufacturers may recommend specific tire size combinations for certain vehicles. It is best to consult with a tire professional for guidance on mixing tire sizes, if necessary.