Shimano CN-HG40 6 / 7 / 8-Speed 116 Link Chain: Hyperglide (HG) series 6, 7, or 8-speed compatible chain, recommended for Altus & older Alivio / STX drivetrains. Comes with quick & easy to use connecting link. Weight: 335 grams 114 links HG technology has chamfered inner plates to optimise shifting performance on HG sprockets Durability is assured through the heat treatment of rollers, pins, & 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- & 8-speed HG drivetrains