The speed rating or speed index is represented by a letter and associated with the tyre’s maximum speed capability when operating at its maximum load-carrying capacity (i.e. load index). So, for an example, a tyre marked with a ‘Y’ speed rating indicates that it can be safely operated at a maximum speed of 300 km/h. You must ensure you are not exceding the speed limit while weighing less then the load index.
| Speed Category Symbol | Speed (km/h) | Speed Category Symbol | Speed (km/h) |
|---|---|---|---|
| A1 | 5 | K | 110 |
| A2 | 10 | L | 120 |
| A3 | 15 | M | 130 |
| A4 | 20 | N | 140 |
| A5 | 25 | P | 150 |
| A6 | 30 | Q | 160 |
| A7 | 35 | R | 170 |
| A8 | 40 | S | 180 |
| B | 50 | T | 190 |
| C | 60 | U | 200 |
| D | 65 | H | 210 |
| E | 70 | V | 240 |
| F | 80 | W | 270 |
| G | 90 | Y | 300 |
| J | 100 | Z | *Over 240 |
4 March 2021
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