Shimano CN-HG40 6/7/8-Speed Chain 116 links (Ampoule type connect pin)

$19.00 USD

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The Shimano CN-HG40 Chain is a dependable, affordable and smooth-shifting replacement chain for 6, 7 and 8-speed bikes, making it a smart drivetrain refresh for Brisbane commuters, recreational riders, fitness bikes and everyday Australian cycling.

CN-HG40 Features

Compatible with Shimano 6, 7 and 8-speed HG drivetrains
Designed for precise HYPERDRIVE SIS and DUAL SIS indexed shifting
Durable steel construction for commuting, fitness riding and recreational use
Great-value replacement for stretched, noisy or worn chains
Ideal service item for older road, hybrid, MTB and commuter bikes

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Technical Specifications

Product Name: Shimano CN-HG40 Chain
Product Type: Bicycle chain
Speed Compatibility: Shimano 6-speed, 7-speed and 8-speed drivetrains
Chain Type: HG 8/7/6-speed chain
Recommended Drivetrain System: HYPERDRIVE SIS and DUAL SIS indexed shifting systems
Common Retail Length: 116 links, depending on supplied package
Average Weight: Approximately 324g, based on Shimano specification
Pin Link Plate: Grey finish
Roller Link Plate: Brown finish
Chain Width: Commonly listed around 7.4mm for 6/7/8-speed use
Connection Type: Some packages include Shimano SM-UG51 Quick Link; other packages may vary by distributor
Recommended Use: Commuting, hybrid riding, recreational cycling, fitness riding, entry-level MTB, older road bikes and drivetrain servicing
Best Bike Type: 6, 7 or 8-speed commuter bikes, hybrid bikes, flat-bar road bikes, recreational mountain bikes, kids’ bikes, fitness bikes and indoor trainer bikes
Main Upgrade Purpose: Chain replacement, smoother shifting, reduced drivetrain noise, cassette protection and bike service refresh

Compatibility Notes

Designed for Shimano 6, 7 and 8-speed HG drivetrains.
Not suitable for Shimano 9, 10, 11 or 12-speed drivetrains.
Not compatible with SRAM Flattop, SRAM Eagle, Campagnolo 11/12/13-speed or modern narrow 12-speed systems.
A new chain may skip on a worn cassette or freewheel, so sprocket wear should be checked before installation.
Chain length must be sized correctly before riding.

Shimano HG Chain Design

The CN-HG40 is designed to work with Shimano HG sprockets and indexed shifting systems. This helps the chain move cleanly between gears when paired with a compatible cassette or freewheel and properly adjusted derailleur.

HYPERDRIVE SIS / DUAL SIS Compatibility

Shimano’s indexed shifting systems rely on chain, cassette and derailleur compatibility. The CN-HG40 is built to support accurate shifts on older but still widely used 6, 7 and 8-speed drivetrains.

Durable Everyday Construction

This chain is designed for practical reliability rather than high-end race weight savings. Its durable steel construction makes it well suited to commuter bikes, recreational bikes and everyday transport.

Service-Friendly Replacement

Replacing a worn chain is one of the most cost-effective ways to improve a bike’s feel. A stretched chain can cause poor shifting, noise, skipping and accelerated wear on cassettes, freewheels and chainrings.

Smooth Indexed Shifting

When paired with a clean drivetrain and correctly adjusted derailleur, the CN-HG40 helps restore smooth gear changes and quieter pedalling on older bikes.

Great Value for Older Bikes

Many 6, 7 and 8-speed bikes are still excellent everyday machines. A fresh chain can make them feel much more efficient without the cost of replacing a full drivetrain.

Chain Measurements

Speed: 6, 7 and 8-speed compatible
Common Length: 116 links, depending on package
Average Weight: Approximately 324g
Chain Type: Shimano HG
Connection: Shimano Quick Link or joining method depending on supplied version

Fit Checklist Before Purchase

Before ordering, confirm:

Your bike uses a 6, 7 or 8-speed drivetrain
Your rear gears are a compatible cassette or freewheel system
Your cassette, freewheel and chainrings are not excessively worn
Your rear derailleur and shifter are working correctly
Your required chain length can be cut from the supplied chain
You have the correct chain tool or quick link pliers if fitting at home

Installation Notes

Size the chain correctly before fitting.
Use a suitable chain breaker if shortening the chain.
Install the supplied connector according to the package instructions.
Check rear derailleur indexing after installation.
Check front shifting if used on a double or triple crankset.
Replace the cassette or freewheel if a new chain skips under load.

The Shimano CN-HG40 is best suited to riders maintaining a practical 6, 7 or 8-speed bike who want better shifting, quieter pedalling and dependable everyday performance.

Best Suited For

Commuter cyclists replacing a worn chain
Hybrid and fitness bike riders
Recreational MTB riders

Product Care

Clean and lubricate the chain regularly.
Use chain lubricant suited to commuting, road or light off-road conditions.
Wipe excess lubricant after application to reduce dirt build-up.
Check chain wear with a chain checker.
Replace the chain before it becomes excessively stretched.
Clean more often after wet rides, dusty paths or indoor trainer use.
Avoid harsh degreasers that strip lubrication from inside the rollers.
Inspect cassette, freewheel and chainrings when replacing the chain.
Have shifting checked after fitting a new chain.
Replace the cassette or freewheel if a new chain skips under load.

Warranty Information

Warranty coverage is subject to Shimano or retailer terms and conditions.
Warranty generally applies to manufacturing defects in materials or workmanship.
Normal chain wear, poor lubrication, corrosion, incorrect installation, drivetrain incompatibility, crash damage and contamination are generally not covered.
Chain life depends on riding conditions, lubrication habits, cassette or freewheel condition, chainring wear, rider power and cleaning frequency.
Professional installation is recommended for correct chain length, connector fitting and derailleur adjustment.

Rider feedback around the Shimano CN-HG40 is generally positive when it is used on compatible 6, 7 or 8-speed bikes.

Common positive rider comments include:

Good value for basic drivetrain servicing
Smooth shifting when paired with a clean cassette or freewheel
Reliable option for older bikes
Easy choice for commuter and hybrid bike repairs
Helps reduce chain noise and rough pedalling
Practical replacement for family bikes and trainer bikes
Compatible with many older Shimano drivetrains
Affordable way to keep a bike running well

Some riders note that older drivetrains often have worn cassettes, freewheels or chainrings, so a new chain may skip if the rest of the drivetrain is too worn. A proper drivetrain inspection is recommended.

Shimano CN-HG71

Higher-level 6, 7 and 8-speed compatible Shimano chain
More refined finish and durability
Better for riders wanting a premium option for older drivetrains
Usually higher price than CN-HG40

KMC Z7 / Z8 Chains

Popular aftermarket alternatives
Often supplied with reusable-style joining links
Good value for commuter and hybrid bikes
Shift feel may differ slightly from genuine Shimano

SRAM 8-Speed Chains

Suitable for many SRAM-style 8-speed drivetrains
Compatible in many mixed setups, depending on drivetrain
Different connector and plate design
Best matched to SRAM systems where applicable

Budget Generic Chains

Lower upfront price
Quality and durability can vary
May shift less smoothly than Shimano
Best avoided for riders wanting dependable service life

Where the Shimano CN-HG40 Stands Out

Genuine Shimano compatibility
Reliable HG shifting performance
Affordable service replacement
Works with 6, 7 and 8-speed drivetrains
Practical for commuters, hybrids, recreational bikes and family bikes
Strong choice for regular bike servicing

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