This site contains stories, photos, news, maps, thoughts and other musings by, and about, the Button Family in the West (mostly California).
This is a family web site intended for extended family members and close friends. All others are welcome ... but may be confused.
Tire Speed Rating Letters
The rating letter on the tire sidewall indicates the maximum continuous speed the tire is rated to sustain.
| Tire Letter | Speed Rating | |
|---|---|---|
| MPH | KPH | |
| J | 62 | 100 |
| N | 87 | 140 |
| P | 94 | 150 |
| S | 112 | 180 |
| H | 130 | 210 |
| V | 149 | 240 |
| Z | 149+ | 240+ |
| W | 168 | 270 |
| Y | 186 | 299 |