* Hyperglide (HG-X) series 10-speed directional Dyna-Sys compatible chain for use with 10-speed MTB drivetrains * HG-X Chain uses a directional design with specifically shaped inner and outer plates to optimise shifting over the chainset and 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 and near silent running * Durability is assured through a chromising treatment on link pins, and the heat treatment of rollers, pins, and plates * Open design of inner links increase mud shedding ability * Mushrooming of the pins gives unsurpassed side-plate retention, enabling the chain to far exceed the BS/ISO standard for breaking force * Chain is optimised for Shimano 10-speed HG-X MTB drivetrains only * Corrosion-resistant Zinc-alloy plating and grey finish on inner and outer plates * 114 links, 273 grams