The asymmetric tread ribs are designed to absorb the considerable forces acting on the tires when driving at high speeds, making abrupt manoeuvres or when the road surface changes. This ensures the vehicle maintains good adherence to the road and allows for agile steering precision.
The tread pattern ribs provide outstanding braking capability and steering precision by absorbing the forces exerted on braking, which means a reduction in stopping distance.
The unique grooves allow increased clearance of water for better resistance to aquaplaning.
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.