Homologated tyres are those that have been approved directly via a manufacturer. These tyres are ones that have met the standards and regulatory requirements of the manufacturer.
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 Pilot Sport 4S is indeed seen as a long term substitute for the Pilot Super Sport and it sits nicely between the Pilot Sport Cup 2, Michelin's road legal track focused tyre and the more versatile, mass market sports tyre, the Pilot Sport 4.
The Ultra-reactive tread pattern design, adapts continuously to the road, for optimised footprint on the surface. Giving the driver a high level of reactivity and improved feeling.
The Pilot Sport 4S also features 'Dynamic Response' technology; a hybrid belt of aramid and nylon which ensures optimum transmission of steering instructions onto the road.
The exceptional dry grip and improved wet braking are the result of Bi-Compound technology (e.g. more than one compound on the tread) featuring a novel hybrid elastomer for dry grip and a new mix of compound with specific "functional elastomers" and silica for excellent WET grip and braking.