According to the EU Tyre Marking Regulation, passenger car tyres and light truck tyres shall have an additional label indicating the following key characteristics
I. Fuel efficiency
The less energy the tyre consumes during rolling, the less fuel is needed to continue driving. Friction of the passenger car tyre with the surface of the road can absorb about 20% of the required energy, and of truck tyre - up to 30% .
The rolling resistance level is assessed on a scale from A to G
A - the most effective parameter (maximum fuel economy)
G - the least effective parameter (minimum fuel efficiency)
Choosing tyres with better performance you get lower fuel consumption. The difference between two classes of rolling resistance reveals in the difference of fuel consumption in the volume of about 0.1 l per 100 km. The results depend on the type of car and weather conditions. .
II. Wet grip
Determines the ability of the tyre to hold the road in on wet road surface.
It is estimated on a scale from A to G
A - the safest parameter (maximum tyre grip)
G - the least safe parameter (minimum tyre grip)
Choosing tyres with better wet grip performance you get improved wet braking performance and, accordingly, improved driving safety. The difference in the braking distance of cars with the tyres of class G and A can reach 18 m (on a wet road, for an average passenger car moving at a speed of 80 km/h).
III. The noise level
Indicates the external noise generated by the moving car. The noise of the tyres from contact with the road can range from 50 to 80% of the overall noise of the car. However, it should be noted that the overall noise generated by the car depends, among other things, on the nature of the road surface.
The noise level rating is classified into three classes in the form of one, two, or three sound waves. The more waves, the louder the tyre is
1 black wave - quiet tyre (at least 3 dB below the limit value for Europe)
2 black waves - moderately loud tyre (between the limit value and the level lower by 3 dB)
3 black waves - a noisy tyre (above the limit value for Europe)
According to the new marking, the difference between one black wave and three waves is significant. A tyre with one black wave generates 6 dB less noise than a tyre with three waves (four times louder).