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