Super Narrow Hyperglide (HG) series 10-speed compatible directional chain, recommended for Tiagra 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 runningFor use with double chainset only5.88 mm chain width, optimised for 10-speed Super Narrow HG drivetrainsCorrosion-resistant grey finish on outer plates116 links, 277 grams (114 links)