MTX floating discs are made from two segments of stainless steel which are riveted together to allow the outer section of stainless steel to expand under extreme temperatures. The outer section is manufactured from Japanese SUS 420 stainless steel then heat-treated to HRC 36+-2 while the centre of the disc is manufactured from steel or alloy. Fits: Triumph DAYTONA 1000 1992 DAYTONA 1200 1993-1998 DAYTONA 750 1990-1992 DAYTONA 900 1992-1997 DAYTONA SUPER III 1995 SPEED TRIPLE 900 1994-1996 SPEED TRIPLE T509 1997 SPRINT 900 1994-1998 TROPHY 1200 1993-2002 TROPHY 900 1996-2001