This heavy duty bike chain blade from Campagnolo offers you high safety and reliability. With the chain wheel record 12-way 34 teeth screws you can achieve optimal control and drive the bicycle chain. With a tooth number of 34 teeth and a circle of 146 mm (4 arms), this inner particularly robust steel chain ring is designed for all bicycle chains and is suitable for durability, optimal performance and perfect interplay when driving (crankset, chain, rear derailleur etc.) only components of the same manufacturer (e.g. Campagnolo).