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: Honda CB250N 1981-1982 CB250RS 1980-1984 CB250T1-T2 1978-1981 CB400A 1977-1981 CB400T 1978 CB650C CUSTOM 1979-1982 CB750C Custom 1981 CB750K 750 FOUR 1979-1980