The S3 sintered compound is optimal for street bikes, dual sport, touring, cruisers. It's recommended on applications with rather larger engines or for people who ride harder than average and want the great stopping power of a sintered brake pad. Fits: CF Moto CF500 CLASSIC 2012-2016 X400 2015-2017 X400 LE 2015-2017 X5 Terralander 500 2011-2016 X500 2012-2016 X500 EPS 2017-2018 X500 FARM SPEC 2015-2018 X550 EPS 2015-2019 X6 Terralander 2011-2012 X6 Terralander EFI 2013-2014