The Genuine Replacement for Your Sword 2x Drivetrain. Keep your gravel or adventure bike shifting smoothly with the Microshift Sword 29T inner chainring. Specifically designed as a direct replacement for Sword and Sword Black 2x cranksets, this chainring features an 80mm BCD for a perfect fit. Whether you're refreshing a worn drivetrain or carrying a spare for a long-distance tour, this genuine Microshift component ensures the reliable, crisp shifting performance the Sword group is known for