Compatible with 8/9/10/11speed cassettes. Designed for road and mountain bikes, this replacement cog integrates seamlessly with existing 11T, 12T, and 13T gear setups, delivering smooth shifting and reliable power transfer for cycling enthusiasts Long lasting steel construction. Made from robust steel, this cog resists wear and tear, maintaining performance through demanding rides and varied terrain conditions Easy maintenance and cleaning. The silver finish and compact tooth design allow quick cleaning, preventing dirt buildup and ensuring consistent performance with simple upkeep Precise tooth ratio options. Available in 11T, 12T, and 13T configurations, this sprocket offers versatile gearing to match riding style and optimize pedaling efficiency Use scenario: Daily commuting on mixed terrain. Reads cleanly with existing cassettes, providing dependable shifting and efficient propulsion on urban streets and light trails Use scenario: Mountain trail riding. Durable steel construction handles grit and moisture while maintaining reliable performance during climbs and technical sections Use scenario: Road cycling or endurance training. Select the 11T/12T/13T options to fine tune cadence and gearing, pairing with your current cassette for efficient, smooth pedaling over long rides