| 1.4. |
In order to cover the range of the tyre sizes fitting the commercial vehicles, the [DEL] Standard Reference Test Tyres (SRTT) shall be used to measure the relative wet index as shown in the following table: |
a3c0 |
| 1.4. | In order to cover the range of the tyre sizes fitting the commercial vehicles, three Standard Reference Testing Tyre (SRTT) sizes shall be used to measure the relative wet index: | a0c0 |