The Shimano CN-HG71 [paid link] chain is a workhorse among 6, 7, and 8-speed drivetrains, valued for its reliable performance and smooth shifting. Whether used on a commuter bike, a vintage road bike, or a touring setup, maintaining this chain properly is crucial for preserving drivetrain efficiency and prolonging component life. This guide provides a comprehensive overview of how to maximize the performance of your CN-HG71 [paid link] chain through meticulous care and regular maintenance.
Understanding the CN-HG71 Chain
The CN-HG71 [paid link] chain belongs to Shimano’s Hyperglide (HG) series and is designed for multi-speed drivetrains, specifically 6, 7, and 8-speed systems. It features a plated link finish that improves rust resistance and offers consistent shift performance, making it a solid choice for everyday riders and enthusiasts alike.
Its engineered chamfered plates ensure smooth gear transitions, but this benefit can only be sustained through proper maintenance. Dirt, grime, and neglect can degrade its performance over time, emphasizing the need for attentive care.
Tools Required
- Chain checker tool
- Chain cleaning device or brushes
- Degreaser
- Chain lubricant (wet or dry type depending on conditions)
- Gloves
- Clean rags
- Master link pliers (if applicable)
Routine Cleaning for Peak Efficiency
Routine cleaning is critical for keeping the CN-HG71 chain in top condition. Neglecting regular cleaning will cause dirt and contaminants to build up, increasing friction and accelerating wear. Aim for a basic cleaning after every 100-200 kilometers, adjusting based on riding conditions.
Start by wiping down the chain with a clean, dry rag to remove surface dirt. For a more thorough cleaning, use a chain cleaning device with a quality degreaser. This device clamps around the chain and uses rotating brushes to clean it thoroughly as you backpedal. Ensure all degreaser is rinsed off afterward and let the chain dry completely before proceeding.
For riders frequently encountering wet or muddy conditions, more frequent cleanings are advisable. A chain exposed to moisture will suffer quicker corrosion if not attended to properly.
Proper Lubrication: The Key to Longevity
After cleaning and drying, lubrication is vital. Choose your lubricant based on the riding environment. A dry lube [paid link] is ideal for dusty or dry conditions, offering a clean finish but requiring more frequent reapplication. Wet lubes, on the other hand, are more durable in wet or muddy environments but attract more grime.
Apply lubricant sparingly, targeting the rollers rather than the outer plates. Too much lube will attract dirt and defeat the purpose. Drip a small amount on each roller while slowly backpedaling the crankset, ensuring even distribution. Once applied, wipe off any excess lubricant with a rag to avoid attracting debris.
Lubricate the chain every 200-300 kilometers under normal conditions. However, after wet rides or exposure to rain, reapply lube immediately after cleaning and drying.
Inspecting for Wear and Stretch
Chain stretch is a common issue that compromises shifting performance and accelerates the wear of cassette and chainrings. Use a chain checker tool to monitor the wear. Insert the tool into the chain and observe if it falls into place at the 0.5% or 0.75% markers—values indicating it is time to consider replacement.
For the CN-HG71, replacement is generally recommended when the 0.75% wear indicator fits easily. Allowing the chain to stretch beyond this point risks damaging more expensive drivetrain components, resulting in greater repair costs.
Troubleshooting Performance Issues
Even with careful maintenance, issues can arise. If you notice skipping gears or sluggish shifts, inspect the chain for stiff links. These can be caused by dirt build-up or improper lubrication. Flex the chain laterally and check each link; any stiff links should be worked back and forth manually or replaced if necessary.
In cases where shifting remains imprecise despite a clean, well-lubricated chain, assess the drivetrain as a whole. Chainrings and cogs with shark-tooth wear patterns can also cause performance issues, indicating the need for component replacement.
Storage Tips to Prolong Chain Life
Proper storage can prevent premature degradation of the CN-HG71 chain. Always store the bike indoors or under cover to protect it from the elements. If storing the bike for an extended period, clean and lubricate the chain thoroughly before doing so. Moisture and corrosion are silent killers of chain life during long-term storage.
Avoiding Common Mistakes
A few key mistakes can drastically shorten the lifespan of your CN-HG71:
- Over-lubricating: Leads to dirt accumulation and gritty paste on the chain.
- Neglecting cleaning: Allows contaminants to grind down metal surfaces.
- Using the wrong lube: Inappropriate lubricant for the conditions can cause poor protection.
- Ignoring chain wear: Riding with a worn chain damages the cassette and chainrings.
Paying attention to these areas will ensure the CN-HG71 chain continues to perform optimally.
When Replacement Becomes Necessary
No chain lasts forever, and the CN-HG71 is no exception. A well-maintained chain can last several thousand kilometers, but environmental conditions and riding habits will impact this. Once the chain checker tool signals excessive stretch, or if shifting becomes increasingly unreliable despite maintenance, it is time to replace the chain.
A fresh CN-HG71 chain not only restores smooth performance but also preserves the integrity of your drivetrain components, delaying the need for more expensive repairs.
By following these guidelines, you can ensure that your Shimano CN-HG71 chain delivers the reliable, smooth performance it’s designed for throughout its service life.