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: Polaris ACE 325 2015-2016 ACE 325 HD 2016 ACE 570 HD 2016-2018 ACE 570 HD EPS 2018-2021 ACE 900 XC 2018-2019 LSV ELECTRIC 4X4 2011-2012 RANGER 400 4x4 2010-2014 RANGER 500 2017-2021 RANGER 500 2X4 2005-2009 RANGER 500 4x4 2005-2011 2013 RANGER 500 Crew 4x4 2011-2013 RANGER 570 MID SIZE 2014-2021 RANGER 700 4x4 2005-2006 2008-2009 RANGER 700 4x4 BUILT AFTER 1/15/07 2007 RANGER 700 4x4 BUILT BEFORE 1/15/07 2007 RANGER 700 EFI 6X6 2007-2009 RANGER 800 2011-2014 RANGER 800 FULL SIZE 6X6 2010-2014 RANGER 900 XP FULL SIZE 2013-2014 RANGER CREW 570 EFI 2015-2021 RANGER CREW 800 2010-2011 2013 RANGER CREW 900 2015-2017 RANGER CREW XP 1000 EPS NORTHSTAR EDITION 2020 RANGER CREW XP1000 EPS 2018-2021 RANGER DIESEL 1000 HD EPS FULL SIZE 2016-2020 RANGER DIESEL 1028 FULL SIZE 2016-2017 RANGER DIESEL 900 4x4 2011-2014 RANGER ETX MID SIZE 2015-2017 RANGER EV MID SIZE 2015-2021 RANGER EV MID SIZE 4X4 2011-2014 RANGER EV MID SIZE 4x4 2010 RANGER SERIES 10 4x4 & 6x6 2007 RANGER SERIES 11 4x4 & 6x6 2007 RANGER XP 1000 2017-2018 RANGER XP 1000 HD EPS 2019-2020 RANGER XP 800 2012-2013 RANGER XP 900 EPS FULL SIZE 2015-2020 RZR 4 800 2011-2014 Ranger 1000 EPS 2020 SPORTSMAN ACE 570 2014-2017