The highest populated classes should be determined for the specific tyre dimension and properties (the tyres that could be actually fitted on the vehicle, and including the three peak mountains snowflake pictogram if use of the vehicle is for severe snow conditions). The information can be checked in the EPREL. The class for a whole category would be meaningless, as the class for the same brand and model can change based on the tyre size: for every different size, classes for rolling resistance coefficient, wet grip and noise can be different. 25/55 ELI: http://data.europa.eu/eli/C/2023/267/oj EN OJ C, 20.10.2023 72. Is comparison of tyre Fuel Efficiency, Wet Grip and Rolling Noise classes done across all tyres or separately within tyre categories, e.g. winter, all-season, and summer tyres? Comparison is done within a specific tyre category, meaning tyre size and certified special properties. Tyres with the three peak mountains snowflake pictogram can be specifically selected (those that are also for ice can be selected). Beyond this, distinctions do not exist for ‘winter’ ‘all-season’ or ‘summer’ (however, arguably a tyre marketed ‘all-season’ but without the three peak mountains snowflake pictogram would not have sufficient performance in severe snow conditions). For example tyres of size ‘205/55 R16’ from the same brand and with the same tread design (thus same seasonality as well) may have different classes for the 3 parameters depending on the speed category index or other aspects (e.g. specifically designed for an original equipment manufacturer (OEM) or another OEM). All necessary parameters (size designation, load capacity index, speed category, season) have to be entered in EPREL for a correct comparison of the selected tyres.
Source: Question 71 from the COMMISSION NOTICE C/2023/267 on the interpretation and implementation of certain legal provisions of the EU Taxonomy Climate Delegated Act
Disclaimer: Please note that the European Commission cannot provide a legally binding interpretation of the EU legislation, as this is the sole competence of the European Court of Justice. Any remarks from the European Commission services are without prejudice to the position the Commission might take should related cases arise in a procedure before the Court of Justice.