How to Install, Adjust, and Maintain the CN-HG701 Chain

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in Chains, Shimano

The Shimano CN-HG701 [paid link] chain is a high-performance, 11-speed chain designed for both road and mountain bike drivetrains. It features Sil-Tec surface treatment for reduced friction and improved durability, making it a popular choice among cyclists who want smooth and reliable shifting. However, proper installation, adjustment, and maintenance are crucial to maximizing its lifespan and ensuring optimal drivetrain performance.

This guide provides a detailed, step-by-step approach to installing, adjusting, and maintaining the CN-HG701 [paid link] chain, including troubleshooting common issues, ensuring compatibility, and optimizing its performance.

Tools Required

  • Chain breaker tool
  • Quick-link pliers (if using a quick-link)
  • Chain wear checker
  • Torque wrench [paid link] (for crankset and cassette adjustments)
  • Degreaser and chain cleaning brush
  • Chain lubricant (wet or dry, depending on riding conditions)
  • Gloves (optional but recommended)

Step-by-Step Installation of the CN-HG701 Chain

Proper installation ensures smooth shifting and drivetrain longevity. Follow these steps to correctly install the Shimano CN-HG701 [paid link] chain on your bike.

1. Determine the Correct Chain Length

Before installation, you must determine the correct length for your chain:

  • Method 1: Wrap Around the Largest Cog and Chainring
    • Shift your derailleur to the smallest chainring and cog.
    • Wrap the chain around the largest chainring and the largest rear cog without passing through the derailleur.
    • Add two full links (one inner and one outer link) to this length for proper fit.
  • Method 2: Compare with the Old Chain
    • If your old chain was the correct length, lay it side by side with the new chain and match the length.
    • Be sure to account for wear—a worn chain may be slightly longer.

2. Cutting the Chain to Size

  • Use a chain breaker tool to remove any excess links.
  • Ensure that the ends of the chain are compatible with your connection method (quick-link or Shimano pin).

3. Connecting the CN-HG701 Chain

The CN-HG701 comes with Shimano’s Quick-Link (SM-CN900-11) or can be joined using a Shimano connecting pin.

  • Using a Quick-Link
    • Insert the quick-link into the chain.
    • Rotate the pedals until the quick-link is at the top of the drivetrain (between the chainring and cassette).
    • Apply pressure to the pedals to securely snap the link into place.
  • Using a Shimano Connecting Pin
    • Insert the special Shimano chain pin into the open link.
    • Use a chain tool to push the pin in until it sits flush.
    • Break off the excess portion of the pin with pliers.

4. Checking the Installation

  • Shift through all the gears to ensure smooth engagement.
  • Check for stiff links—manually flex any that feel tight.
  • Ensure the chain runs smoothly over the cassette and chainrings.

Adjusting the CN-HG701 Chain for Optimal Performance

Proper chain tension and derailleur alignment are critical for smooth shifting and drivetrain efficiency.

1. Rear Derailleur Adjustment

  • Set the high-limit screw to prevent the chain from dropping off the smallest cog.
  • Adjust the low-limit screw to ensure the chain reaches the largest cog without overshooting.
  • Fine-tune the cable tension using the barrel adjuster.

2. Front Derailleur Alignment

  • Ensure the front derailleur cage is parallel to the chainrings.
  • Adjust the height so there is a 2mm gap between the derailleur and the largest chainring.
  • Set the limit screws to prevent overshifting.

3. Chainline Optimization

  • The CN-HG701 chain is directional—make sure the logos face outward for optimal shifting.
  • If shifting is rough, check the chainline to ensure it aligns with the cassette and chainrings.

Maintaining the CN-HG701 Chain for Longevity

Regular maintenance is essential to prevent premature wear and ensure smooth operation.

1. Cleaning the Chain

  • After every 150–200 km, wipe the chain with a clean rag to remove surface dirt.
  • Deep clean every 500–700 km using a chain-specific degreaser and a brush.

2. Lubricating the Chain

  • Apply wet lube [paid link] for rainy or muddy conditions.
  • Use dry lube [paid link] for dry and dusty rides.
  • Wipe off excess lube to prevent dirt buildup.

3. Checking for Wear

  • Use a chain wear indicator tool to check for elongation.
  • Replace the chain when wear exceeds 0.5% for road bikes and 0.75% for mountain bikes.

Troubleshooting Common CN-HG701 Chain Issues

Even with proper setup, issues can arise. Here’s how to fix them:

1. Noisy Shifting

  • Ensure the chain is lubricated properly.
  • Check for a misaligned derailleur hanger.
  • Verify that the chain is installed in the correct direction.

2. Chain Skipping Under Load

  • The cassette or chainrings may be worn and need replacement.
  • Ensure proper chain length and tension.
  • Check if the chain is stretched beyond 0.5% wear.