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: Buell 1125CR 2008-2012 1125R 2007-2010 XB12R Firebolt 2009-2010 XB12S Lightning 2009-2010