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: 117mmMinimum Thickness: 4.5mmDisc Position: Rear Fits: Honda CB500F 2013-2019 CB500X 2013-2022 CBR500R 2013-2018 CBR500R ABS 2013-2021 CBR650F 2014-2018 CBR650R 2019-2022