Shimano Dura-Ace XTR CN-7701 9-Speed ChainHyperglide (HG) series 9-speed compatible chain, recommended for XTR and Dura-Ace drivetrains.HG technology has chamfered inner plates to optimise shifting performance on HG sprockets.Durability is assured through a chromising treatment on link pins, and the heat treatment of rollers, pins, and plates.Mushrooming of the pins gives unsurpassed side-plate retention, enabling the chain to far exceed the BS/ISO standard for breaking force.6.57mm chain width, optimised for 9-speedSuper Narrow HG drivetrains.Zinc-alloy silver finish offers the longest lasting and best resistance to corrosion.114 links; 304 grams