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 technology Japanese SUS 420 Stainless Steel Replacement for Original Equipment OEM Design; lightening & drill hole patterns Specifications: O.D: 220mmI.D: 127mm Minimum Thickness: 3.5mm Disc Position: Rear Fits: Husqvarna CR125 2002-2005 CR250 2002-2005 SM450R Motard 2003-2006 SM510R 2005 SM570 2002-2004 TC250 2002-2004 TC450 2003-2004 TC510 2004 TC570 2001-2003 TE250 2002-2006 TE410 2000-2001 TE450 2002-2005 TE510 2002-2005 TE570 2002-2004 WR125 2002-2006 WR250 2002-2007 WR300 2007-2014 WR360 2002-2003