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 ATC250R 1985-1986 ATC350X 1985 CH250 SPACEY 1986-1989 CR125R 1984-1986 CR250R 1984-1986 CR500R 1984-1986 TRX250R 1986-1989 TRX250X 1987-1992 XL250R 1986-1987 XL350R 1984-1987 XL500R 1983-1984 XL600R 1983-1987 XR250R 1984-1987 XR350R 1984-1987 XR500R 1983-1985 XR600R 1985-1987