Hg701 6800 ultegra chain 11 speed super narrow lightweight 11 speed chain for smooth shifts and maximum durability 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 the inner plate has been developed for better contact with gears providing smoother shifting under high load giving efficient pedalling increased rigidity and near silent running