Division 1.1
United Kingdom
Class C1 tyres, with reference to the nominal section width of the tyre that has been tested:
| Tyre class | Nominal section width (mm) | Limit values in dB(A) |
|---|---|---|
| C1A | ≤ 185 | 70 |
| C1B | > 185 ≤ 215 | 71 |
| C1C | > 215 ≤ 245 | 71 |
| C1D | > 245 ≤ 275 | 72 |
| C1E | > 275 | 74 |
For snow tyres, extra load tyres or reinforced tyres, or any combination of these classifications, the above limits shall be increased by 1 dB(A).