The shimano hg701 ultegra 6800 11 speed chain super narrow lightweight 11 speed hg ev symmetrical design chain for smooth shifts and maximum durability shimano hg701 ultegra 6800 11 speed chain features outer plate design has been developed to reduce the chance of chain suck sil tec surface treatment technology ptfe plating on inner and outer links that is smooth running and increases durability zinc alloy plated outer links the inner plate has been developed for better co