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 FLHR 1340 ROAD KING 1994-1998 FLHR 1450 ROAD KING 1999 FLHR Touring 1995-1997 FLHRCI ROAD KING CLASSIC 1998-1999 FLHRI 1340 ROAD KING F/I 1996-1997 FLHS 1340 ELECTRA GLIDE SPORT 1990-1992 1994 FLHT 1340 ELECTRA GLIDE 1990-1996 1999 FLHTC 1340 ELECTRA GLIDE CLASSIC 1990-1999 FLHTCI 1340 ELECTRA GLIDE CLASSIC 1995-1999 FLHTCU ELECTRA GLIDE ULTRA CLASSIC 1990-1998 FLHTCUI 1340 ELECTRA GLIDE ULTRA CLASSIC F/I 1995-1998 FLHTCUI 1450 ELECTRA GLIDE ULTRA CLASSIC F/I 1999 FLST 1340 HERITAGE SOFTAIL 1988-1990 FLSTC SOFTAIL HERITAGE CLASSIC 1987-1989 FLTC 1340 TOUR GLIDE CLASSIC 1988-1992 FLTCU 1340 ULTRA CLASSIC TG 1989-1995 FLTCUI 1340 ULTRA CLASSIC TG FI 1996