Hyperglide (HG) series 10-speed compatible chain, recommended for Ultegra drivetrains.Key Features:HG technology has chamfered inner plates to optimise shifting performance on HG sprockets,Durability is assured through a chromising treatment on link pins, and the heat treatment of rollers, pins, and plates,Mushrooming of the pins gives unsurpassed side-plate retention, enabling the chain to far exceed the BS/ISO standard for breaking force,5.88 mm chain width, optimised for 10-speedSuperNarrow HG drivetrains,Zinc-alloy silver finish on outer plates, and grey finish on inner plates increase corrosion resistance,114 links, 280 grams.