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: 240mmI.D: 118mmMinimum Thickness: 3mmDisc Position: Front Left Fits: Honda CR125R 1984-1988 CR250R 1984-1988 CR500R 1984-1988 XL600R 1983-1987 XR250R 1986-1991 XR250R AUSTRALIA 1986-1987 XR500R 1984-1985 XR600R 1985-1987 XRB200 1993-2001 Suzuki RM250 1988