MTX solid discs are constructed using one complete segment of Japanese SUS 420 stainless steel then heat-treated to HRC 36+-2. Lightening and drill hole patterns are as per OEM designs to improve braking performance and reduce the temperature of the disc.MTX Discs provide amazing braking control for your motorcycle. All MTX discs are designed and manufactured with world-leading cutting edge technologies:Precision CNC machined and laser-cut technologyJapanese SUS 420 Stainless SteelReplacement for Original EquipmentOEM Design; lightening & drill hole patternsSpecifications:O.D: 240mmI.D: 101mmMinimum Thickness: 2.5mmDisc Position: Front Left Fits: Honda CR125R 1995-2004 2006 CR250R 1995-2007 CR500R 1995-2004 CR500R ENDURO 2003-2004 CR500RE ENDURO 2002 CRF250R 2004 2008-2013 CRF250X 2004-2007 2009-2016 CRF450R 2002-2006 2008-2009 2011-2012 2014 CRF450X 2005-2017