The conformity with this Regulation of the declared fuel efficiency, wet grip and external rolling noise classes, as well as the declared values, and any additional performance information on the tyre label, shall be assessed for each tyre type or each grouping of tyres as determined by the supplier, according to one of the following procedures:
A single tyre or tyre set is tested first. If the measured values meet the declared classes or the declared external rolling noise value within the verification tolerances referred to in the table below, the tyre label shall be considered to comply with this Regulation.
If the measured values do not meet the declared classes or the declared external rolling noise value within the verification tolerances referred to in the table below, three additional tyres or tyre sets are to be tested; the average measurement value stemming from the three additional tyres or tyre sets tested is to be used to verify the declared information, taking into account the verification tolerances referred to in the table below.
Where the classes or values on the tyre label are derived from type‐approval test results obtained in accordance with Regulation (EC) No 661/2009, or UNECE Regulation No 117, Member States may use measurement data obtained from the conformity of production tests on tyres that were carried out under the type‐approval procedure established by Regulation (EU) 2018/858.
Assessments of the measurement data obtained from the conformity of production tests shall take into account the verification tolerances referred to in the table below.
| Measured parameter | Verification tolerances |
|---|---|
| RRC (fuel efficiency) | The aligned measured value shall not be greater than the upper limit (the highest RRC) of the declared class by more than 0,3 N/kN. |
| External rolling noise | The measured value shall not be greater than the declared value of N by more than 1 dB(A). |
| Wet grip | The measured value G(T) shall not be lower than the lower limit (the lowest value of G) of the declared class. |
| Snow grip | The measured value shall not be lower than the minimum snow grip index. |
| Ice grip | The measured value shall not be lower than the minimum ice grip index. |