The K5 sintered compound is optimal for off-road dirt bikes and ATV. It is recommended for riders who demand great off-road stopping power and brake pad durability when riding on tough off-road terrain. Fits: CF Moto CF500 CLASSIC 2012-2016 CF800-3 TRACKER 2013-2014 X400 2015-2019 X400 LE 2015-2019 X500 2012-2016 X500 EPS 2017-2019 X500 FARM SPEC 2015-2019 X550 EPS 2015-2019 X6 Terralander 2011-2012 X6 Terralander EFI 2013-2014 Yamaha YFM660 GRIZZLY 2002-2008 YFM660FA GRIZZLY AUTO 4X4 2009