Speed Rating
Example:
205/55 R16 91W
The 91W at the end of the tire size is the tire's service description. A service description tells you what load index and speed rating a tire has.
The number (91) represents the tire's load index. The following letter (W) is the tire's speed rating.
| Speed Rating | km/h | mph |
|---|---|---|
| G | 90 | 56 |
| J | 100 | 62 |
| K | 110 | 68 |
| L | 120 | 75 |
| M | 130 | 81 |
| N | 140 | 87 |
| P | 150 | 93 |
| Q | 160 | 99 |
| R | 170 | 106 |
| S | 180 | 112 |
| T | 190 | 118 |
| U | 200 | 124 |
| H | 210 | 130 |
| V | 240 | 149 |
| W | 270 | 168 |
| Y | 300 | 186 |