Tyre Labels in More Detail
Tyres are responsible for between 20% and 30% of a vehicle’s fuel consumption. As a tyre rolls it uses energy and so a tyre that has a lower rolling resistance will use less energy and this has a direct impact on fuel efficiency and CO2 emissions.
Wet Grip Performance
Wet grip performance is one of the most important safety characteristics of a tyre. Tyres with good wet grip have shorter braking distances on wet roads. Two types of test are used to measure a tyres grip when braking from 50mph in wet conditions. Results are combined and ranked on the tyre label. Each grade equates to a difference in braking distance of approximately 3 meters. Therefore fitting tyres ranked A can outperform lower ranked tyres when braking in the wet by up to 15 meters, which clearly could help avert a road traffic accident.
External Rolling Noise
The inclusion of external rolling noise as a key aspect of a tyre’s performance is to encourage motorists to buy low noise tyres and thereby reduce noise pollution. A microphone measures the rolling noise of a car travelling at 50mph with the engine turned off and the results, in decibels, are given for each tyre.
Tyres showing the Three Peak Mountain Snowflake symbol are designed to perform in severe snow conditions and have been tested in accordance UNECE Regulation No 117.
Tyres showing the Ice Stalagmite symbol are specially designed for road surfaces covered with ice and compact snow and should only be used in very sever climate conditions (e.g. cold temperatures). Using ice grip tyres in less severe climate conditions (e.g. wet conditions or warmer temperatures) could result in sub-optimal performance, in particular for wet grip, handling and wear.