Shimano CN-6701 Ultegra HG 10-speed ChainSuper narrow lightweight 10 speed directional chain for optimum cassette and chainset interaction and maximum power transfer 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