Super Narrow Hyperglide (HG) series 10-speed compatible directional chain, recommended for 105 drivetrainsChain uses a directional design with specifically shaped inner and outer plates to optimise shifting over the chainset and cassetteOuter plate design has been developed to reduce the chance of chain suckThe inner plate has been developed for better contact with gears providing smoother shifting under high load, giving efficient pedalling, increased rigidity, and near silent runningDurability is assured through a chromising treatment on link pins, and the heat treatment of rollers, pins, and platesFor use with double chainset only5.88 mm chain width, optimised for 10-speed Super Narrow HG drivetrainsCorrosion-resistant grey finish on inner and outer plates116 links, 280 grams