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: Suzuki GN250 1982-2007 GS1000G 1980-1981 GS1100 1982-1985 GS1100GK 1982-1986 GS1100GL 1982 GS450E 1980-1983 GS450L 1982-1987 GS850G 1980-1985 GSX250 1980-1981 GSX250ES 1982-1987 GSX400E 1982-1984 GSX400E 2 CYLINDER 1980-1981 GSX400F 1981 GSX400S 1984 GSX750E 1980-1983 GSX750ES 1983-1985 GSX750S KATANA 1983-1985 TS250 1971-1976