Find Your Vehicle's Tire Size

You can find your car's tire size in several locations: 1) On the driver's side door jamb sticker, 2) In your vehicle's owner manual, 3) On the sidewall of your current tires, or 4) Sometimes inside the glove compartment or fuel door. The tire size typically follows a format like P215/65R16 95H.

A tire size like P215/65R16 breaks down as follows: P indicates it's a Passenger tire, 215 is the width in millimeters, 65 is the aspect ratio (height as percentage of width), R means Radial construction, and 16 is the wheel diameter in inches. Additional numbers and letters after this (like 95H) indicate load index and speed rating.

While it's possible to use a different tire size, it's best to stick with sizes recommended by your vehicle manufacturer. Changing tire size can affect speedometer accuracy, ABS operation, traction control, and overall handling. If you do change sizes, ensure the overall diameter remains within 3% of the original specification.

The correct tire pressure for your vehicle is typically found on the driver's side door jamb sticker or in your owner's manual. This is the manufacturer's recommended pressure for optimal performance, fuel economy, and tire wear. Do not use the maximum pressure listed on the tire sidewall, as this is the tire's maximum capacity, not the recommended pressure for your vehicle.

Using the wrong tire size can lead to several issues: inaccurate speedometer readings, compromised handling and stability, improper ABS and traction control function, increased wear on suspension components, and in extreme cases, tires may rub against fenders or suspension parts. Always verify tire sizes are compatible with your vehicle before purchasing.