The energy lost when a tyre is in motion is known as 'rolling resistance'. This has a direct impact on fuel consumption. A tyre's rolling resistance score ranges from A to G. Over the life of the tyre, fitting an A rated tyre could save you up to 6 litres of fuel when compared to a G rated tyre.
A tyre's wet grip capacity is expressed in Grades from A to G. The difference in braking distances between each grade is roughly 3m - an average car length. This makes average stopping distance between an A and G rated tyre 18m. That's 4 car lengths.
The exterior noise grade of a tyre is expressed in decibels - accompanied by one, two or three sound waves, with one wave being the best noise level performance. To achieve the best grade, a tyre’s noise level must be at least 3dB under the legal limit set by the EU.
The tyre reduces rolling resistance on the tyre and at the same time, ensures a high level of safety during braking.
The combination of special additives and optimised tread lug edges makes for improved grip in the wet, leading to short, safe braking distances on wet roads. Moreover, functionalised polymer chains firmly linked to the silica mean lower rolling resistance. Extra-thin sipes reduce tread deformation, thereby also minimising energy loss.
A higher apex and the use of additional bead reinforcements ensure safer and more direct transmission of the lateral forces occurring when steering on wet and dry roads. The weight-reduced sidewall is more supple in its design, thereby also contributing towards improved rolling resistance.
Less deformation movement in the sidewall area above the rim and easier deflection in the sidewall flexing zone by constructive measures. A flat contour with optimal distribution of thread grooves stands for a reduced tread movement and a minimized lateral and longitudinal slip.
Benefits and Advantages
Optimised rolling resistance for reduced fuel consumption.
High braking safety and short braking distances on wet roads.
Best handling on wet and dry roads.
Less lost energy with good handling characteristics.