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: 205mmI.D: 96mmMinimum Thickness: 3mmDisc Position: Rear Fits: Yamaha YFM550FA EPS GRIZZLY 4WD 2009-2013 YFM700F GRIZZLY 2008-2011 YFM700FAP GRIZZLY EPS AUTO 2007-2021 YFM700FAP GRIZZLY EPS AUTO 4X4 2007-2011 YFM700FAP/SE GRIZZLY EPS AUTO 4X4 2012-2015