The Shimano CN-HG40 is a robust and efficient multi-speed bicycle chain, designed specifically for 6-, 7-, and 8-speed drivetrains. It is part of Shimano’s HyperGlide (HG) series and is engineered to deliver smooth, accurate, and reliable shifting performance. With 116 links, and an ampoule-type connecting pin included, this chain is ideal for riders who value reliability, ease of installation, and drivetrain efficiency at an affordable price point.

🔧 Technical Specifications:

• Model: CN-HG40

• Speed Compatibility: 6-speed, 7-speed, 8-speed

• Number of Links: 116

• Pin Type: Ampoule-Type Connecting Pin (included)

• Chain Width: Approx. 7.1 mm (external)

• Material: High-tensile steel with chrome-hardened pins

• Surface Finish: Anti-rust treated (varies by batch)

• Connection Method: Chain tool + Ampoule pin

• Weight: Approx. 330g (116 links)

⚙️ Key Features & Performance:

1. HyperGlide (HG) Technology:

HG technology ensures improved chain-to-sprocket engagement, which results in smoother shifting, particularly during upshifts and downshifts under pedaling load. The outer plate shaping is optimized to interface seamlessly with HG cassettes.

2. Durable Construction:

Crafted from heat-treated, high-tensile steel, the CN-HG40 is resistant to stretching and wear, increasing its usable life and maintaining gear performance. This durability makes it well-suited for daily commuters, recreational riders, and light MTB use.

3. Ampoule-Type Connect Pin:

The chain includes an ampoule-type connecting pin for a strong, secure installation. This ensures a tight bond between the links and helps prevent weak points that could cause chain breakage.

4. Consistent Power Transfer:

With reduced friction between the inner plates and rollers, the CN-HG40 helps deliver efficient energy transfer, supporting both speed and cadence in varied terrain — from flat roads to steep climbs.

5. Versatile Compatibility:

Although optimized for Shimano systems, the CN-HG40 is also compatible with many non-Shimano 6/7/8-speed drivetrains, including entry-level SRAM and MicroSHIFT setups. This makes it a versatile choice for budget-conscious upgrades or repairs.

🚴 Ideal Use Cases:

• City Commuting: Durable and low-maintenance for everyday riding

• Mountain Biking (Entry-level): Good shifting in recreational trail use

• Hybrid/Trekking Bikes: Ideal for weekend rides and fitness cycling

• Touring: Dependable under sustained use with minimal adjustment needs

🛠 Maintenance & Installation:

• Can be shortened using a standard chain tool

• Install using the included ampoule-type pin for optimal strength

• Regular lubrication recommended for extended life and smooth performance