Shimano CN-HG40 6, 7, 8-Speed 116 Link Chain With Connecting Link. Good value replacement chain for 6, 7 & 8 speed drivetrains. Recommended for use with Shimano Altus & Alivio gears found on many hybrid bikes. The HG40 chain comes with a quick link so you can fit it really quickly & take it off for maintenance & cleaning when you need to. The Hyperglide technology helps to provide smoother shifting & a quieter running chain. Features Hyperglide (HG) series 6, 7, or 8-speed compatible chain, recommended for Altus & older Alivio / STX drivetrains HG technology has chamfered inner plates to optimise shifting performance on HG sprockets Comes with quick & easy to use connecting link 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 335 grams