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: 245mmI.D: 82.7mmMinimum Thickness: 4.5mmDisc Position: Rear Fits: Ducati 1098 2007-2008 1098 S/TRICOLOR 2007-2008 1098R 2008-2009 1198 2009-2011 1198 S 2009-2010 1198 SP 2011 STREETFIGHTER S 1099 2010-2011