How to Read Tire Size Numbers

That string of numbers and letters on your tire sidewall contains all the information you need to find the right replacement. Here is a complete breakdown.

## The Tire Size Code Explained

A typical tire size looks like this: **P215/65R15 95H**

### Service Type (P) The letter before the numbers indicates the tire type: - **P** = Passenger vehicle - **LT** = Light Truck - **ST** = Special Trailer - **T** = Temporary spare

### Width (215) This three-digit number is the tire width in millimeters, measured from sidewall to sidewall.

### Aspect Ratio (65) This is the sidewall height expressed as a percentage of the tire width. A 65 means the sidewall height is 65% of 215mm = 139.75mm.

### Construction (R) R means Radial construction, which is standard on virtually all modern tires.

### Wheel Diameter (15) This is the diameter of the wheel the tire fits, measured in inches.

### Load Index (95) This number indicates the maximum load the tire can carry. 95 = 690kg per tire.

### Speed Rating (H) This letter indicates the maximum sustained speed: - **H** = 130 mph (210 km/h) - **V** = 149 mph (240 km/h) - **W** = 168 mph (270 km/h) - **Y** = 186 mph (300 km/h)