Shimano chain 6,7 and 8s CN-HG40 116 links

Shimano CN-HG40 chain: performance and reliability for 6, 7 and 8-speed drivetrains

The Shimano 7 speed chain CN-HG40 is a go-to choice for cyclists seeking a smooth, efficient and durable drivetrain. Designed for bikes equipped with 6, 7 or 8-speed drivetrains, this versatile chain suits mountain biking, trekking and city riding alike. Let’s take a closer look at its technical features, advantages and compatibility.

Engineered for HyperGlide drivetrains

The Shimano CN-HG40 chain is optimized for HyperGlide (HG) cassette systems. This Shimano innovation ensures smoother and quicker gear changes thanks to specially profiled sprockets. The HG40 features a beveled outer plate design, which improves engagement with the cogs and reduces friction for better shifting performance.

6, 7, and 8-speed compatibility

While it's commonly referred to as a Shimano 7 speed chain, the CN-HG40 is fully compatible with a wide range of indexed drivetrains:

• 6-speed systems

• 7-speed systems

• 8-speed systems

It works seamlessly with both rear derailleurs and cassettes or freewheels in road and MTB groupsets, making it ideal for city bikes, trekking bikes, and entry- to mid-range mountain bikes.

Shimano CN-HG40 chain specifications

• Model: CN-HG40

• Speed compatibility: 6 / 7 / 8-speed

• Link count: 116 links

• Approx. weight: 335 g

• Surface treatment: chrome plating for enhanced wear resistance

• Connector type: standard rivet (quick link sold separately depending on version)

Why choose the CN-HG40 for your drivetrain ?

The chain is a critical component in the bicycle drivetrain, connecting the crankset, cassette and rear derailleur. A worn or poor-quality chain can lead to skipped gears, premature sprocket wear, and reduced pedaling efficiency.

With the CN-HG40, Shimano offers an excellent balance of durability, compatibility and value. Its HyperGlide-optimized profile delivers a quiet, responsive and precise drivetrain, ideal for recreational and everyday riders alike.

Maintenance tips

To extend the life of your Shimano 7 speed chain:

• Clean the chain regularly with a dedicated degreaser

• Lubricate with a chain-specific oil suited to riding conditions

• Check for chain stretch with a chain wear tool

Proper maintenance not only prevents premature wear, but also preserves the performance of your entire drivetrain system.

In summary

The Shimano CN-HG40 chain is a reliable, high-performance solution for 6, 7 and 8-speed bikes. Whether you ride in the city, on bike tours or on trails, it guarantees smooth operation and long-lasting performance. Ideal for replacing a worn chain or upgrading your drivetrain, it remains one of the best choices in its class.