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Shimano CN-HG40 is a 114-link bicycle chain with a QUICK-LINK connector, designed for 6-, 7- and 8-speed Shimano HG drivetrains.
Key Features
Construction and Design
The chain consists of 114 steel links designed for everyday riding and regular drivetrain use. Grey outer plates and brown inner plates form a durable construction suitable for urban, mountain, hybrid and touring bicycles.
The chain can be shortened to match the bicycle’s sprocket sizes and drivetrain configuration. Its average weight is approximately 324 g.
Main Functions
The HG construction is designed for precise indexed shifting with Shimano HYPERDRIVE SIS and DUAL SIS systems. The shaped links help the chain move smoothly between the sprockets of the rear cassette or freewheel.
The included QUICK-LINK connector simplifies joining the chain during installation. When fitted correctly, the chain provides consistent power transfer and reliable drivetrain operation.
Use and Compatibility
The CN-HG40 is compatible with 6-, 7- and 8-speed Shimano HG-type cassettes and threaded freewheels. It can be used with single-, double- or triple-chainring drivetrains when all components are designed for the corresponding number of speeds.
The correct chain length must be established before installation. When replacing a worn chain, the cassette and front chainrings should also be inspected, as heavily worn teeth may not operate correctly with a new chain.
Additional Features
The QUICK-LINK is most conveniently installed using dedicated chain-link pliers. Regular cleaning, suitable lubrication and chain-wear checks help reduce wear on the cassette and chainrings.
Summary
The Shimano CN-HG40 is intended for cyclists using a 6-, 7- or 8-speed HG drivetrain. Its 114-link construction, HYPERDRIVE SIS-compatible profile and QUICK-LINK connector make it suitable for replacing a worn chain on urban, touring, hybrid and mountain bikes.
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