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 sprocketsDurability is assured through a chromising treatment on link pins, and the heat treatment of rollers, pins, and platesMushrooming of the pins gives unsurpassed side-plate retention, enabling the chain to far exceed the BS/ISO standard for breaking force5.88 mm chain width, optimised for 10-speedSuperNarrow HG drivetrainsZinc-alloy silver finish on outer plates, and grey finish on inner plates increase corrosion resistance114 links, 280 grams