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: 185mmI.D: 75.5mmMinimum Thickness: 3mmDisc Position: Front Left or Right Fits: Honda TRX420FA IRS 4WD RANCHER 2009-2013 TRX420FE FOURTRAX RANCHER 2007-2013 TRX420FM 4WD RANCHER 2008-2013 TRX420FPA IRS 4WD RANCHER 2009-2014 TRX420FPE FOURTRAX RANCHER 2011-2013 TRX420FPM 4WD RANCHER 2009-2013 TRX420TE FOURTRAX RANCHER 2007-2013