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: Yamaha RD350LC 1981-1982 RZ250 1983-1987 XJ550 1981-1983 XJ750R 1981-1984 XS1100R 1981 XV1000 VIRAGO 1985