Below is a table depicting tire speed rating chart, which represents the maximum speed that a tire is legally certified to travel under specific conditions.
| Speed Symbol | Maximum Speed |
|---|---|
| N | 87 mph (140 km/h) |
| P | 93 mph (150 km/h) |
| Q | 99 mph (160 km/h) |
| R | 106 mph (170 km/h) |
| S | 112 mph (180 km/h) |
| T | 118 mph (190 km/h) |
| U | 124 mph (200 km/h) |
| H | 130 mph (210 km/h) |
| V | 149 mph (240 km/h) |
| W | 168 mph (270 km/h) |
| Y | 186 mph (300 km/h) |
| (Y) | Over 186 mph (300 km/h) |
| Z | 149+ mph (240+ km/h) |
Notes:
- This rating is based on the tire being in optimal condition, including being properly inflated and within load capacity.
- The speed ratings are determined through controlled laboratory testing and do not consider variables like weather, road conditions, and the condition of the vehicle, which can impact a tire’s overall speed performance.
- The “Z” rating used to be the highest rating, but as tire technology advanced, the “W,” “Y,” and “(Y)” designations were introduced.
- The symbol “(Y)” signifies tires that are approved for speeds exceeding 186 mph (300 km/h), commonly used on high-performance supercars and specialized vehicles.
- Always refer to the vehicle’s owner’s manual as well as the tire manufacturer’s recommendations when choosing a tire to ensure you have the correct speed rating for your vehicle.
