The Shimano CN-HG40 6/7/8 Speed Chain (116 Links) delivers precise shifting for Hyperglide drivetrains, ensuring smooth and reliable gear changes. Compatible with 6, 7, and 8-speed HG systems, this chain features chamfered plates for smooth shifting, mushroomed pins for secure retention, and heat-treated rollers for durability. Includes a connecting link for easy fitting. Ideal for Altus, Tourney, and older Alivio/STX setups. Buy at Halfords, the UK's largest bike accessories retailer.