Genuine Shimano replacement part HG technology has chamfered inner plates to optimise shifting performance on HG sprockets Comes with quick and easy to use connecting link Durability is assured through 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 7.3 mm chain width, optimised for 7- and 8-speed HG drivetrains 114 links, 335 grams .