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: Harley Davidson FLS SOFTAIL SLIM 2015-2017 FLSB Sport Glide 2019 FLSS SOFTAIL SLIM S 2016-2017 FLSTC SOFTAIL HERITAGE CLASSIC 2015-2021 FLSTF SOFTAIL FAT BOY 2015-2017 FLSTFBS SOFTAIL FAT BOY S 2016-2017 FXBB Street Bob 2019-2021 FXSB BREAKOUT 2015-2017 FXST SOFTAIL STANDARD 2015 2021 XR 1200X 2012-2013 XR1200 SPORTSTER 2000-2010 XR1200X SPORTSTER 2010-2011 Honda CB1100 2014-2017 CB1100F 2014-2016 CB1300 2001-2012 CB1300S 2005-2012 Hyosung GT650R 2009-2015 ST7 2010-2014 ST7L EFI 2015-2017 ST7L EFI DELUXE 2015-2017