mtb x sync 1x11 chainringX SYNC tall, square tooth design provides maximum chain control Sharp, narrow tooth profile and rounded chamfer edges help manage a deflected chain Mud clearing recesses An integral component of the SRAM 1x drivetrain Chainring Size: 30, 32, 38, 40, 42, 44, 46, 48, 50, 52, 54 Bolt Circle Diameter (BCD): 110 BCD, 130 BCD, 94 BCD Speeds: 11 Compat Yaw: n a Material (Chainring): Aluminum, Steel Color (Chainring): Argon Gray, Black