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: 255mmI.D: 115mmMinimum Thickness: 5mmDisc Position: Rear Fits: Triumph DAYTONA 1200 1993-1998 DAYTONA 750 1990-1992 DAYTONA 900 1992-1997 DAYTONA SUPER III 1995 SPEED TRIPLE 900 1994-1996 SPRINT 900 1993-1998 TRIDENT 750 1991-1995 TRIDENT 900 1992-1995 TROPHY 1200 1991-2002 TROPHY 900 1991-2001