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 FX 1200 1974-1980 FX 1200 SUPER GLIDE 1973-1978 FXB 1340 STURGIS 1980-1983 FXB 1340 STURGIS w/35mm Forks 1984 FXB 1340 STURGIS w/41mm Forks 1984 FXE 1200 1974-1980 FXE 1200 SUPER GLIDE 1974-1980 FXE 1340 SUPER GLIDE 1981-1984 FXE Super Glide 1984 FXEF 1200 FATBOB 1979 FXEF 1340 FATBOB 1979-1981 FXR 1340 SUPER GLIDE II 1982-1983 FXRS 1340 LOW GLIDE 1982-1983 FXRT 1340 SPORT GLIDE 1983 FXS 1200 1978-1979 FXS 1200 LOW RIDER 1978-1980 FXS 1340 LOW RIDER 1979-1982 FXSB 1340 LOW RIDER 1983 FXWG WIDE GLIDE 1980-1983 XLCH 1000 SPORTSTER 1978-1979 1981 XLH 1000 SPORTSTER 1979-1985 XLH 883 SPORTSTER 1970-1984 XLH SPORTSTER SUPER 1970-1983 XLS 1000 ANNIVERSARY 1982 XLS 1000 ROADSTER 1979-1982 XLS 1000 SPORTSTER 1983 XR 1000 1985