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- Wave Tech tooth profile for better chain retention and mud shedding\n- Machined plate 7075 T6 Al for superior stiffness, with hard black anodizing for longer wear\n- Works on both traditional 5-arm cranks, and 4-arm SRAM Exogram cranks. Traditional 5-arm mount 110BCD Shimano, THM, Rotor, Cannondale, Specialized, LOOK and FSA \n- 3-bolt DM versions available\n- InfoCrank, Power2Max, SRM, and Quarq power meter compatible\n- In rough terrain, or just for security, use of an upper guard is still recommended\n- Unauthorized online sales prohibited by manufacturer