With a symmetrical design the shimano ultegra bicycle chain 11 speed offers smooth shifting and total durability boasting a unique outer plate design which prevents the chain from getting stuck the inner plate has also been developed to provide better contact with the gears for efficient pedalling increased rigidity and quiet running optimised for 11 speed super narrow hg ev drivetrains the chain also has ptfe plating for smoother running lm features shimano ultegra cn 6800 bic