The left-hand part of the label shows the contribution made by the tyre to fuel consumption and CO2 emissions.
Tyres, mainly due to their rolling resistance, account for around 20% of vehicles' fuel consumption. A reduction in rolling resistance can therefore make a considerable contribution to the energy efficiency of road transport, and thus to reducing CO2 emissions. It is rolling resistance, measured on a simulator, that determines the grade of the tyre.
What is the difference between an A tyre and a G tyre?
The difference in Rolling Resistance is considerable and represents a technological evolution of several tyre generations.
On a car, the difference in impact on fuel consumption between an A tyre and a G tyre is very large, on the order of 0.5 litres/100km.
This amounts to around 80 litres of fuel per year (assuming 15,000km/year).
Over €100/year for a petrol vehicle (at a pump price of €1.30/l.)
The economic impact on the consumer is very considerable, and so is the environmental impact, as this difference in consumption corresponds to 12g of CO2 emissions per km.
The right-hand side of the label shows the tyre's performance when braking on a wet surface. The measurements are taken on vehicles in conditions defined by European regulations (speed, road characteristics, water depth, temperature, etc.).
The grade is established by comparing the performance of the tested tyre with a reference tyre.
What is the difference between an A tyre and an F tyre? (For this safety performance, tyres given a G grade are not authorised for sale)
The difference in braking distance between a vehicle fitted with category A tyres and a vehicle fitted with category F tyres is over 18 metres.
External rolling noise
Traffic noise is a major source of noise pollution. The lower part of the label concerns the level of noise emitted outside the vehicle, and not the noise perceived by the driver inside the vehicle. The figure expresses the sound level in decibels.