The Shimano CN-HG701 [paid link] chain is a premium choice for road cyclists and gravel riders who prioritize performance and durability. However, improper installation and maintenance practices can quickly degrade the drivetrain, lead to costly repairs, or reduce the overall riding experience. Understanding how to avoid common mistakes specific to the CN-HG701 [paid link] will not only enhance performance but also extend the life of your entire drivetrain system.
Tools Required
- Chain tool (compatible with Shimano chains)
- Shimano Quick-Link pliers
- Chain wear checker
- Torque wrench [paid link] with appropriate fittings
- Chain lubricant (wet or dry, based on riding conditions)
- Degreaser and cleaning brushes
- Protective gloves
- Ruler (for chain length verification)
Incorrect Chain Length Sizing
One of the most overlooked yet critical steps in installing the CN-HG701 [paid link] is setting the correct chain length. A chain that is too long or too short disrupts gear shifting and accelerates wear on the cassette and chainrings.
When sizing the CN-HG701, ensure that the chain wraps around the largest chainring and the largest sprocket without passing through the derailleur. Add two full links (one inner and one outer plate). Shimano’s 11-speed systems require precise chain sizing, and deviating from this method can compromise the drivetrain’s performance and lifespan.
Failing to size the chain correctly can cause unnecessary stress on the derailleur cage, often leading to misalignment or premature failure.
Poor Joining Technique
The CN-HG701 uses Shimano’s proprietary Quick-Link (SM-CN900-11) for joining the chain. A frequent mistake is failing to fully engage and lock the Quick-Link. An improperly connected link can separate under load, posing a significant safety hazard.
After installing the Quick-Link, rotate the cranks backward to position the link on the top run of the chain, then apply pedal pressure to snap the link securely into place. Neglecting this procedure may leave the link partially engaged, making the chain prone to failure under high torque conditions.
Ignoring Factory Lube
Many riders make the mistake of immediately degreasing the factory lubricant on a new CN-HG701 chain. Shimano’s factory lube is designed to provide optimal protection during the chain’s break-in period. Removing this layer prematurely can result in poor initial wear patterns and reduced overall chain life.
It’s advisable to ride the chain for a few hundred kilometers before the first thorough cleaning and re-lubrication cycle. This approach ensures the chain is adequately protected from the start.
Incorrect Lubrication Practices
Applying too much or too little lubricant is another error that can severely impact the CN-HG701’s performance. Over-lubrication attracts dirt and grime, leading to a paste-like buildup that accelerates wear. Under-lubrication, on the other hand, results in metal-on-metal contact that causes excessive friction and heat.
Lubricate only the rollers and wipe off any excess from the outer plates. Regular cleaning and reapplication of lube based on riding conditions (wet or dry lube [paid link]) maintain optimal performance without compromising cleanliness.
Skipping Chain Wear Checks
Many cyclists wait until noticeable shifting problems occur before checking chain wear. By this point, irreversible damage may have already been done to the cassette and chainrings.
Use a reliable chain wear checker tool to measure elongation. Shimano recommends replacing the CN-HG701 when it reaches 0.5% elongation for 11-speed systems. Regular monitoring helps maintain drivetrain integrity and reduces overall replacement costs.
Cross-Chaining Abuse
Cross-chaining—riding in extreme gear combinations like big chainring to big cog or small chainring to small cog—places undue stress on the chain and drivetrain. Although modern drivetrains can handle cross-chaining better than older systems, habitual misuse accelerates wear on the CN-HG701.
Cyclists should aim to maintain a straighter chainline by selecting appropriate front and rear gear combinations. This not only improves efficiency but also prolongs the lifespan of the entire drivetrain.
Over-Tightened or Misaligned Derailleurs
Incorrect derailleur adjustment can create constant lateral stress on the CN-HG701. Over-tensioning the rear derailleur’s B-screw or misaligning the hanger places the chain at awkward angles, promoting premature stretch and chainplate damage.
Always ensure derailleur adjustments fall within Shimano’s recommended tolerances. Use a derailleur hanger alignment tool to confirm correct hanger positioning, especially after crashes or transport.
Mixing with Incompatible Components
Another common pitfall is pairing the CN-HG701 with incompatible drivetrain components. While this chain is compatible with Shimano’s 11-speed road and MTB drivetrains, it is not intended for 12-speed systems or non-Shimano drivetrains that use different chain widths or shifting technologies.
Using the CN-HG701 outside its design parameters can result in subpar shifting performance, excessive wear, and even drivetrain failure.
Improper Storage and Environmental Neglect
Storing the bike in humid or coastal environments without proper chain care leads to corrosion and stiff links. The CN-HG701’s SIL-TEC coating offers enhanced protection, but it is not impervious to neglect.
If the bike will be unused for extended periods, clean and lubricate the chain thoroughly, then store it in a dry, temperature-controlled environment. Regular inspection prevents rust and ensures the chain remains in good working order.
Conclusion
The Shimano CN-HG701 is a high-performance chain that, when installed and maintained correctly, delivers exceptional durability and drivetrain smoothness. By avoiding common mistakes—such as incorrect chain length, poor lubrication practices, and improper component matching—riders can significantly extend the life of their chain and related components. Following these guidelines ensures that the CN-HG701 performs at its peak, maintaining a smooth, reliable ride across countless kilometers.