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: 220mmI.D: 92mmMinimum Thickness: 2.5mmDisc Position: Front Left Fits: Yamaha TTR125 BIG WHEEL 2002-2004 TTR125 LWE BIG WHEEL 2005-2021 TTR125 SMALL WHEEL 2002-2004 TTR125L DISC BRAKE 2000-2004