The Shimano CN-5800 [paid link] chain, part of the reliable 105 11-speed groupset, delivers excellent efficiency and durability when correctly installed and maintained. However, even high-quality chains like the CN-5800 [paid link] can suffer from performance issues due to setup errors, wear, or component incompatibility. This guide explores the most frequent problems users face with the CN-5800 [paid link] and offers clear, actionable solutions to restore optimal functionality.
Inconsistent Shifting Under Load
One of the most reported issues with the CN-5800 chain is inconsistent shifting, especially under load. This often stems from improper chain length or a worn drivetrain component.
When the chain is too short, it limits the rear derailleur’s ability to maintain correct chain tension, which leads to poor engagement on larger cogs. Conversely, a chain that’s too long creates slack and causes ghost shifts or lagging engagement. To resolve this, confirm the chain length using Shimano’s standard method: route the chain around the largest chainring and largest cassette cog (bypassing the rear derailleur) and add two full links.
Additionally, inspect for worn cassette teeth or front chainring pins. If these are damaged or heavily worn, even a new CN-5800 chain won’t shift correctly.
Chain Skipping or Jumping Gears
Another common issue with the CN-5800 chain is skipping or jumping gears during pedaling. This typically results from a worn cassette being paired with a new chain.
The CN-5800 chain is manufactured to tight tolerances, and when introduced to an old cassette that has worn into the profile of a previous chain, poor engagement can occur. If the chain skips only on certain cogs, this is a strong indicator that those cogs are too worn to mesh properly with the new chain.
The best fix is to replace both the chain and cassette simultaneously. If the chain and cassette are relatively new but still skipping, verify the derailleur hanger alignment using a hanger alignment gauge. A misaligned hanger will cause the derailleur to track poorly across the cassette, leading to unpredictable shifting.
Chain Noise and Rough Engagement
Unusual noise or rough engagement can often be traced back to poor chain lubrication or contamination. The CN-5800 chain, while corrosion-resistant, requires consistent cleaning and lubrication to function smoothly.
If the chain emits grinding, squeaking, or ticking sounds, remove it and perform a full degrease using a chain cleaning tool or ultrasonic cleaner. Once dried, apply a quality 11-speed compatible lubricant, ensuring it penetrates each link pin. Wipe off excess to prevent attracting debris.
Also check that the quick link (if used) is correctly installed. An incorrectly oriented quick link can cause a stiff link, leading to periodic noise or tight spots under tension.
Chain Drop and Poor Retention
Chain drops are frustrating and can damage the frame or drivetrain. With the CN-5800, this is often related to poor front derailleur positioning or improper chainline.
Ensure the front derailleur cage is parallel to the chainrings and that the gap between the outer plate and the largest chainring is set correctly (typically 1-3mm). An improperly adjusted derailleur will struggle to shift smoothly, increasing the risk of the chain overshooting the chainring.
If issues persist, inspect the bottom bracket width and crankset spacing to ensure proper chainline. A misaligned chainline can increase lateral stress on the chain, causing premature drops or noisy running.
Premature Chain Wear
Premature wear on the CN-5800 chain typically arises from neglecting chain cleaning, riding in cross-chained gear combinations too frequently, or using incompatible lubricants.
To prolong the chain’s life, avoid using the large chainring with the largest cassette cog and the small chainring with the smallest cog. These cross-chain configurations increase lateral tension and accelerate wear. Clean and re-lubricate the chain every 200–300 km in dry conditions or after every wet ride.
Regularly check chain stretch with a chain wear tool. Replacing the chain before it reaches 0.75% elongation can prevent wear on more expensive drivetrain parts.
Chain Stiff Links
Stiff links in the CN-5800 chain can develop after installation, particularly if a pin is improperly driven in or if debris causes corrosion.
Isolate the stiff link by backpedaling the crank and watching for a jump or hesitation. Use a chain tool to gently flex the link laterally, which can loosen the tightness. For persistent stiff links, remove and reinstall the link with a fresh connecting pin or quick link.
Conclusion
The Shimano CN-5800 chain is a durable and efficient component when installed and maintained correctly. By recognizing the common issues outlined above and addressing them with precise adjustments and timely maintenance, cyclists can ensure their drivetrain operates reliably and quietly. Regular inspection, adherence to manufacturer specifications, and compatible component use will extend the chain’s life and preserve shifting performance.
FAQs
1. Can I use the CN-5800 chain with a 10-speed drivetrain? No, the CN-5800 is designed specifically for 11-speed systems. Using it with a 10-speed drivetrain may result in poor performance and shifting inconsistencies.
2. How often should I replace my CN-5800 chain? Replace the chain once it reaches 0.75% wear. This typically occurs between 2,000–3,000 km, depending on riding conditions and maintenance.
3. Is a quick link or connecting pin better for CN-5800 chains? Both are viable, but Shimano recommends using their dedicated connecting pin for optimal strength and compatibility.
4. Can stiff links be repaired, or should I replace the chain? Stiff links can usually be repaired unless the chain is damaged or severely corroded. If in doubt, replacing the affected link or chain is safest.
5. Why is my new CN-5800 chain skipping on my cassette? This is likely due to cassette wear. Replace the cassette along with the chain for optimal meshing and performance.