The Hornet Wave keeps you out there at your best. Designed for performance.Using Lightweight induction hardened stainless steel the Hornet Wave discs offers superior strength and durability while using MTXs innovative technology to keep you in control under high stress braking. Constructed using one complete segment of SUS 420 stainless steel, then heat-treated to HRC 36+-2. MTXs Wave technology ensures your discs stay cool through high strain environments.All MTXdiscs 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 High Tech Wave perforated design Optimum heat dissipation Specifications: O.D: 240mm I.D: 121mm Minimum Thickness: 3.5mm Rotor Position: Rear Fits: Honda CR125R 2002-2004 2006 CR250R 2002-2007 CRF250R 2004 2008-2013 2015-2019 CRF250X 2004-2007 2009-2016 CRF450R 2002-2006 2008-2009 2011-2012 2014-2019 CRF450RX 2017-2020 CRF450X 2005-2016