The Shimano HG40 6-8 Speed Chain with Hyperglide / Ultraglide for precise shifting. This chain is recommended for Altus and older Alivio / STX drivetrains. HG technology uses chamfered inner plates to optimise shifting performance on HG sprockets. The mushrooming of the pins gives unsurpassed side-plate retention, enabling the chain to exceed the BS/ISO standard for breaking force and durability is assured thanks to the heat treated rollers, pins and plates. The chain is 7.3mm wide, optimised for 7 and 8-speed HG drivetrains and has 114 links with a connecting link for quick and easy fitting. Weighing in at 335g.