Shimano 5701 105 10-speed chain Super Narrow Hyperglide (HG) series 10-speed compatible directional chain, recommended for 105 drivetrains Chain uses a directional design with specifically shaped inner & outer plates to optimise shifting over the chainset & cassette Outer plate design has been developed to reduce the chance of chain suck. The inner plate has been developed for better contact with gears providing smoother shifting under high load, giving efficient pedalling, increased rigidity, & near silent running Durability is assured through a chromising treatment on link pins, & the heat treatment of rollers, pins, & plates For use with double chainset only 5.88 mm chain width, optimised for 10-speed Super Narrow HG drivetrains Corrosion-resistant grey finish on inner & outer plates 116 links, 280 grams