The S3 series is optimal for common street riding on street bikes and cruisers with rather larger engines.
Its recommended for riders who ride harder and want great stopping power.
The S3 compound provides low abrasive interaction with the brake rotor and a much quieter braking because the ceramic composite material. It can also perform under higher temperatures than AD.
Friction materials contain metal-ceramic with a bronze-graphite designed for dry and wet applications. Coarser non-metallic friction additives are spread evenly on the base fine bronze body to achieve optimal friction properties.