Hyperglide hg series 10 speed compatible chain44 recommended for ultegra drivetrainshg technology has chamfered inner plates to optimise shifting performance on hg sprocketsdurability is assured through a chromising treatment on link pins44 and the heat treatment of rollers44 pins44 and platesmushrooming of the pins gives unsurpassed side plate retention44 enabling the chain to far exceed the bsiso standard for breaking force588 mm chain width44 optimised for 10 speedsupern