With the REACT series, KMC has filled a gap in its lineup of drive solutions. Just like KMC chainrings and sprockets, REACT cassettes are precisely designed to match KMC chains. This perfect synergy reduces friction between individual components and enhances the lifespan of all drive components. Meticulously crafted ascent and descent ramps ensure precise chain guidance, improving shifting performance across the entire range. Made from high-strength steel, REACT cassettes are compatible with Shimano HG 

• Lifting and lowering ramps provide improved shifting performance, overall component interaction efficiency and stability
• Unique lifting ramps design carries the chain smoothly upward on the cogs
• Distinctive lowering ramps adeptly align the chain quickly
• Cogs sizes are design to provide smoother shifting and precise chain indexing to suit all riders
• Optimized for use with KMC e11, X11, X11 EL, and X11 SL chains