High block stiffness in the tread pattern centre and the large number of sipes with maximum formation of gripping edges provide improved braking power on wet and icy roads.
The large number of blocks and sipes on the tire shoulders create a multitude of gripping edges and consequently more effective traction in snow.
Due to an even distribution of block stiffness and the corresponding even pressure distribution in the ground contact patch, the tire has a lower and more even wear resulting in higher mileage performance.
Secure grip in wet conditions is crucial for safe driving. Performance is graded into classes, A to G (although D and G are not currently used). The stopping distance between a class A tire and a class F tire can be as much as 18 metres.
Reduced rolling resistance saves fuel and cuts CO2 emissions. Class A tires deliver the best fuel efficiency, with each subsequent class through to G increasing fuel consumption by between 0.42 and 0.56 mpg for a car which does 36 mpg.
This is the external noise made by the tire and is measured in decibels. The more filled bars shown on the label, the louder the tires.