S3 pads are suitable for both the front and rear brake while on off-road applications the S3 is only recommended for the front brake. The S3 series is designed for low abrasive interaction with the rotor and quieter braking due to the ceramic composite material. It has an HH friction rating and performs better at higher temperatures than the AD compound. Friction materials contain metal-ceramic with a bronze-graphite and non-metallic friction additives are spread evenly on the base fine bronze body to achieve optimal friction properties. Fits: Harley Davidson XL 1200CA CUSTOM A 2014 XL 1200CB CUSTOM B 2014 XL 1200V SEVENTY TWO 2014-2017 XL 883N IRON 883 2014-2017 XL1200C SPORTSTER CUSTOM 2014-2016 XL1200CX ROADSTER 2017-2019 XL1200NS Sportster Iron 2019-2021 XL1200T SUPERLOW 2014-2017 XL1200X FORTY-EIGHT 2014-2021 XL1200X FORTY-EIGHT SPECIAL 2019-2020 XLH883L SUPER LOW 2014-2020