How to Install, Adjust, and Maintain the Flattop Chain

Posted on
in AXS, Chains, SRAM

The Flattop Chain [paid link], designed for SRAM’s AXS 12-speed road drivetrains, brings increased strength, efficiency, and a distinctive look. However, proper installation, adjustment, and maintenance are essential to ensure optimal performance and longevity.

In this guide, we’ll cover everything you need to know about setting up your Flattop Chain [paid link] correctly, troubleshooting common issues, and maintaining it for long-lasting performance.

Tools Required

Before you begin, make sure you have the necessary tools:

  • Chain breaker tool compatible with 12-speed chains
  • Master link pliers (for quick-link removal and installation)
  • Torque wrench [paid link] (for checking drivetrain component tightness)
  • Chain wear indicator tool
  • Chain lubricant suitable for road cycling
  • Clean rags and degreaser for maintenance

Understanding the Flattop Chain

The Flattop Chain [paid link] features a unique design that provides increased strength while maintaining a narrow profile for precise shifting. Unlike traditional chains, it has a wider flat outer plate and a unique quick link, which requires specific installation techniques.

Key Features:

  • Narrower Profile: Optimized for SRAM AXS 12-speed drivetrains.
  • Asymmetric Design: The chain must be installed in the correct orientation.
  • Hard Chrome Coating: Enhances durability and reduces wear.
  • Flattop Quick Link: A tool-free master link that requires precise installation.

How to Install the Flattop Chain

1. Measuring and Sizing the Chain

Proper chain length is crucial for smooth shifting and drivetrain longevity. Follow these steps to determine the correct length:

  • Wrap the chain around the largest front chainring and the largest rear cog, bypassing the derailleur.
  • Pull the chain taut and add two additional links to the measurement before cutting.
  • If you are using a rear derailleur with a clutch mechanism, consult the SRAM sizing guide for specific recommendations.

2. Installing the Flattop Quick Link

The Flattop Chain includes a dedicated quick link, which must be installed correctly:

  • Ensure the chain is routed correctly through the derailleur pulleys.
  • Align the quick link pins and snap them into place using master link pliers.
  • Pedal forward to engage the link fully. Do not force it into place—it should seat naturally with pedaling pressure.

3. Verifying Correct Installation

  • Check that the Flattop side of the chain faces outward.
  • Rotate the cranks and shift through all gears to ensure smooth engagement.
  • Use a torque wrench [paid link] to verify proper tightness of the derailleur and cassette.

Adjusting the Flattop Chain for Optimal Performance

1. Ensuring Proper Chain Tension

Incorrect tension can lead to poor shifting performance and premature wear. The chain should have:

  • No excessive slack in small-small gear combinations.
  • Smooth tension with no skipping under load.

2. Fine-Tuning Shifting Performance

  • Adjust the limit screws on the rear derailleur to prevent chain overshifting.
  • Use micro-adjustment settings on the derailleur (if available) to optimize chain positioning.
  • Check the B-tension screw for correct clearance between the largest cog and the derailleur pulley.

Maintaining the Flattop Chain for Longevity

1. Cleaning the Chain Properly

Regular cleaning prevents dirt buildup and ensures smooth operation. Follow these steps:

  • Use a chain-specific degreaser and a soft brush to clean between the links.
  • Avoid high-pressure water, which can force contaminants into the chain’s internals.
  • Wipe the chain dry before applying lubricant.

2. Lubrication Best Practices

Using the right lubricant and applying it correctly can extend the lifespan of your Flattop Chain.

  • Use a wet lube [paid link] for rainy or muddy conditions and a dry lube [paid link] for dry road conditions.
  • Apply a small drop to each chain link and wipe off the excess with a clean rag.
  • Allow the lube to settle for at least 10 minutes before riding.

3. Checking for Chain Wear

A worn chain can damage your cassette and chainrings. Use a chain wear indicator tool to measure stretch:

  • Replace the chain if wear exceeds 0.5% for aluminum cassettes and 0.75% for steel cassettes.
  • Monitor for stiff links, which may indicate dirt buildup or lubrication issues.

Common Flattop Chain Issues and Troubleshooting

1. Noisy Shifting or Skipping Gears

  • Ensure the chain is installed with the Flattop side facing outward.
  • Check derailleur alignment and adjust indexing settings.

2. Chain Dropping Under Load

  • Verify chain length and tension.
  • Inspect the quick link for proper installation.

3. Quick Link Issues

  • If the quick link feels stiff, apply a small amount of lube and manually flex the link.
  • Always replace the quick link when installing a new chain.

Final Thoughts

Proper installation, adjustment, and maintenance of the Flattop Chain are crucial for ensuring smooth, efficient drivetrain performance. By following this guide, you can extend your chain’s lifespan, reduce wear on your drivetrain, and improve shifting precision.