Hyperglide (HG-X) series 10-speed directional Dyna-Sys compatible chain for use with 10-speed MTB drive trains HG-X Chain uses a directional design with specifically shaped inner & outer plates to optimise shifting over the chainset & cassette 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 The Mushrooming of the pins gives unsurpassed side-plate retention, enabling the chain to far exceed the BS/ISO standard for breaking force Sil-Tec surface treatment technology (PTFE plating) that is smooth running & increases durability