This robust road bike chain blade from O.SYMETRIC offers you high safety and reliability. With the O.Symetric chain ring kit 110 mm Dura Ace FC 9000 Ultegra FC6800 50/34 teeth SW you can achieve optimal control and drive of the bicycle chain. With a tooth number of 44 teeth, 50 teeth and a hole circle of 110 mm (4 arms), this particularly lightweight aluminium chain ring is designed for all 11-speed bicycle chains and is suitable for double cranks.