Understanding how to read a tire size might seem like deciphering a secret code, but once you break it down, it’s actually quite straightforward. Tire size is typically found printed on the sidewall of your tire, in a format like this: P215/60R16 94T. Let’s decode what that all means.
- Tire Type: The first letter (e.g., P) indicates the type of tire. P stands for Passenger vehicle. You might also see LT (Light Truck) or no letter, which may imply a Euro-metric size used on passenger vehicles.
- Tire Width: The first number (215) is the width of the tire in millimeters, measured from sidewall to sidewall. A wider tire provides more grip but can affect fuel economy and ride comfort.
- Aspect Ratio: The number after the slash (60) is the aspect ratio, which is the height of the sidewall as a percentage of the width. In this case, the height is 60% of 215 mm. Lower ratios typically mean sportier handling and a stiffer ride.
- Construction: The next letter (R) stands for Radial construction, which is the most common type today. You might occasionally see D for Diagonal (bias-ply) construction.
- Wheel Diameter: The next number (16) is the wheel’s diameter in inches. This must match the size of the wheel rim on your vehicle.
- Load Index and Speed Rating: The final part (94T) indicates the load index and speed rating. 94 refers to the maximum load the tire can carry, and T is the speed rating (in this case, up to 118 mph or 190 km/h).
Knowing how to read tire size helps ensure proper fit, safety, and performance. Want help decoding your current tires or picking the right ones for your ride? I’m all ears.
