The shimano ultegra cn hg700 6800 11spd chain is super narrow and lightweight with a hg ev symmetrical design for smooth shifts and maximum durability the outer plate design has been developed to reduce the chance of chain suck and sil tec surface treatment technology ptfe plating on inner and outer links makes sure the chain stays running smooth and increases durability the inner plate has been developed for better contact with gears providing smoother shifting under high load giving effic