How to Install, Adjust, and Maintain the SRAM Flattop Chain

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The SRAM Flattop chain [paid link], a key component in SRAM’s road groupsets like RED eTap AXS [paid link] and Force eTap AXS, is designed to deliver exceptional shifting performance, durability, and efficiency. Thanks to its unique design and narrow profile, it supports SRAM’s 12-speed drivetrains with unmatched precision. However, proper installation and maintenance are crucial to fully harness these benefits. This guide covers every aspect you need to install, adjust, and maintain your SRAM Flattop chain [paid link] like a professional.

Tools Required

  • Chain breaker compatible with 12-speed chains
  • Flattop PowerLock quick link
  • Chain wear checker (compatible with 12-speed chains)
  • Torque wrench [paid link] with a small torque setting (optional)
  • Bike stand [paid link] (for stability during installation)
  • Degreaser and chain lubricant designed for 12-speed chains
  • Clean rag or cloth
  • Gloves for protection

Understanding the SRAM Flattop Chain [paid link]

The SRAM Flattop chain stands out due to its asymmetric design, where the top surface is flatter compared to conventional rounded chains. This innovative structure not only reduces weight but also improves aerodynamic performance and chain retention, crucial for modern 12-speed road drivetrains. The Flattop technology demands meticulous attention during installation and maintenance to achieve optimal performance and lifespan.

Pre-Installation Considerations

Before installing the SRAM Flattop chain, it’s essential to verify drivetrain compatibility. The Flattop chain is designed exclusively for SRAM’s AXS 12-speed road drivetrains and must not be used with older 11-speed systems or chains from other brands. Using incompatible components can lead to shifting issues and premature wear.

Ensure that the cassette, chainrings, and derailleur pulleys are clean and in good condition. Installing a new chain on worn drivetrain parts will accelerate chain wear and compromise performance.

How to Install the SRAM Flattop Chain

Sizing the Chain

Proper chain length is vital for optimal performance and drivetrain longevity. To determine the correct length:

  1. Route the new chain through the front chainring and rear derailleur (bypassing the rear derailleur’s clutch mechanism).
  2. Pull the chain tight around the largest chainring and the largest cog on the cassette.
  3. Add two additional inner links to this length.
  4. Mark the link where the chain should be cut.

Cutting the Chain

Use a chain breaker tool compatible with 12-speed chains to remove excess links precisely at the marked position. Avoid reusing previously broken links; always cut fresh.

Installing the Chain

Route the chain correctly through the front and rear derailleurs, ensuring it follows the specific path designed for SRAM’s 12-speed systems. Pay close attention to the narrow-wide tooth profiles on the chainrings to ensure smooth meshing.

Securing with PowerLock

Join the chain using the SRAM Flattop PowerLock quick link:

  • Insert each end of the chain into the PowerLock link.
  • Align the link and apply steady pedal pressure by hand or use a chain whip tool [paid link] until the link clicks into place securely.
  • Ensure that the Flattop side is facing outward for optimal aerodynamic and mechanical efficiency.

How to Adjust the SRAM Flattop Chain

Although the Flattop chain itself doesn’t have adjustable tension, proper derailleur adjustment is critical for peak performance. Fine-tuning includes:

  • B-tension Adjustment: Check and adjust the B-screw to maintain the recommended clearance between the upper pulley and the largest cog.
  • Limit Screws: Ensure that high and low limit screws are properly set to prevent the chain from overshifting off the cassette.
  • Chainline Verification: A misaligned chainline can cause excessive noise and wear. Make sure the bottom bracket and crankset are properly installed according to SRAM specifications.

Maintenance of the SRAM Flattop Chain

Routine maintenance is key to the longevity and efficiency of the SRAM Flattop chain. Unlike traditional chains, the Flattop requires careful attention due to its specific surface treatment and narrow design.

Cleaning Routine

  • Wipe the chain after every ride using a clean, dry rag to remove surface dirt and moisture.
  • Every 200-300 kilometers, perform a deep clean with a degreaser designed for bike chains.
  • Rinse thoroughly and allow to dry completely before re-lubricating.

Lubrication Routine

  • Apply a light, even coat of 12-speed-specific chain lube.
  • Wipe off excess lube to avoid attracting dust and debris.
  • Focus lubrication on the chain rollers, not the outer plates, for best results.

Chain Wear Inspection

Using a 12-speed-compatible chain checker, measure the wear periodically. Replace the chain before it exceeds 0.5% wear to protect the cassette and chainrings.

Troubleshooting Common Set-Up Issues

  • Chain Skipping Under Load: May indicate an overly worn chain or cassette. Verify chain wear and inspect cassette teeth.
  • Noisy Shifting: Often caused by incorrect B-tension or worn pulleys. Fine-tune B-screw and inspect pulley bearings.
  • PowerLock Failure: Ensure only a new PowerLock is used during reinstallation; SRAM PowerLocks are designed for one-time use only.
  • Chain Dropping: If the chain drops frequently, check the chainline and ensure chainring teeth are not excessively worn.

Customization and Optimization Tips

For riders looking to maximize performance, consider upgrading to SRAM’s Red AXS Flattop chain which features a harder chrome treatment for improved durability and smoother shifts under load. Additionally, applying a wax-based lubricant can reduce friction and extend the cleaning interval compared to traditional oil-based lubricants.

Installing a top-quality, ceramic-bearing pulley set can also complement the Flattop chain by reducing drivetrain friction and enhancing overall efficiency during long rides and races.

Comparison with Similar Models

Compared to traditional 12-speed chains from competitors like Shimano or KMC, the SRAM Flattop chain is specifically tailored for SRAM’s AXS road drivetrains. The Flattop’s unique asymmetric design offers superior aerodynamic benefits and enhanced lateral stiffness, contributing to more precise shifts. However, it is less cross-compatible with non-SRAM drivetrains, limiting its application to riders fully invested in the SRAM ecosystem.

Understanding Compatibility

The SRAM Flattop chain must be paired with SRAM AXS 12-speed cassettes, chainrings, and derailleurs. It is incompatible with earlier SRAM 11-speed systems and any non-SRAM 12-speed road components. Using it outside of its intended system risks poor shifting performance and premature drivetrain wear. Always ensure all drivetrain parts are AXS-specific for best results.

Conclusion

The SRAM Flattop chain is a highly advanced component offering exceptional performance for 12-speed road bikes. Correct installation, precise adjustment, and diligent maintenance are critical to ensure long-term reliability and efficiency. By following this guide, riders can confidently manage their Flattop chains and experience the superior shifting and durability SRAM intended.