Precision cassette cog compatibility Compatible with 8/9/10/11 speed drivetrains, delivering smooth and reliable gear transitions and consistent performance across varied terrains. Durable steel construction Made from robust steel to resist wear and tear, providing long service life and dependable power transfer during intense cycling. Flexible tooth options Available in 11T, 12T and 13T configurations to match your riding style, enabling cadence control and efficient pedaling for climbing and sprinting scenarios. Easy maintenance design Silver finish resists dirt buildup, helping the cog stay cleaner longer and simplifying maintenance while maintaining smooth operation ride after ride. Practical use scenarios Climbing on hilly routes: choose a larger tooth option (13T) to help maintain a comfortable cadence during steep grades. Flat or rolling terrain sprints: select 11T for higher gearing to achieve quicker accelerations and higher speeds. Upgrading or replacing worn cogs: suitable for road bikes with 8/9/10/11 speed drivetrains to restore smooth shifts and extend drivetrain life.