DIY Guide to Replacing Derailleur Cables for Force eTap AXS D2 (12-speed)

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Replacing the derailleur cables on your SRAM Force eTap AXS D2 (12-speed) is an essential maintenance task that ensures your shifting remains smooth and responsive. This guide provides a step-by-step approach to replacing the derailleur cables, troubleshooting common issues, and optimizing your shifting performance. Whether you’re a beginner or an experienced rider, this guide will help you replace your derailleur cables with confidence.

Tools Required

  • 5mm Allen wrench
  • 2mm Allen wrench
  • Cable cutters
  • Torque wrench
  • Torx driver (T10 or T25 depending on the model)
  • New derailleur cables (12-speed compatible)
  • Grease or anti-seize lubricant
  • Electrical tape (optional)

Understanding the SRAM Force eTap AXS D2 (12-speed) Derailleur System

Before replacing the derailleur cables, it’s important to understand the key components of the SRAM Force eTap AXS D2 (12-speed) system. The Force eTap AXS D2 is a wireless electronic shifting system, which means there are no mechanical cables connecting the shifters to the derailleurs. However, you will still need to replace the cables that run through the frame and connect to the derailleurs.

The derailleur cables for this system are essential for maintaining proper tension and ensuring smooth shifting performance. The cables need to be replaced when they show signs of wear, fraying, or loss of performance.

Step-by-Step Guide to Replacing Derailleur Cables

1. Remove the Old Cables

Start by shifting your bike into the smallest chainring and the smallest cog on the cassette. This will relieve tension on the derailleur cables and make the replacement process easier.

  • Use a 5mm Allen wrench to remove the rear derailleur hanger bolt and disconnect the derailleur from the bike.
  • Use the 2mm Allen wrench to remove the cable anchor bolt from the derailleur.
  • Pull the derailleur cable through the derailleur and frame, ensuring you do not damage the cable routing or any internal parts of the frame.
  • If your front derailleur also requires cable replacement, repeat the same process.

2. Prepare the New Cables

The Force eTap AXS D2 system uses 12-speed specific cables. Measure the length of the old cables to ensure the new cables are the correct length. It is always better to have a little extra length than too little, as you can trim excess cable later.

  • Cut the new cables using the cable cutters. Ensure the ends are clean and straight.
  • Lubricate the new cables lightly with a suitable grease or anti-seize lubricant to ensure smooth operation and to prevent corrosion.

3. Install the New Cables

  • Begin by threading the new cable through the frame and into the derailleur housing.
  • Once the cables are correctly routed, secure the rear derailleur by attaching the cable anchor bolt. Use a 2mm Allen wrench to tighten it securely, but do not overtighten.
  • Reattach the rear derailleur to the hanger, ensuring it is aligned correctly.

4. Adjust the Tension

Now that the new cables are installed, it’s time to adjust the tension. Proper tension is crucial for accurate shifting.

  • Adjust the rear derailleur tension by using the barrel adjuster on the derailleur. Turn the barrel adjuster clockwise to increase tension and counterclockwise to decrease tension. Make small adjustments while testing the shifting performance.
  • If your bike has a front derailleur, repeat the process to adjust the front derailleur tension. Make sure both the front and rear derailleurs shift smoothly across all gears.

5. Test the Shifting Performance

Once both cables are installed and adjusted, test the shifting by riding your bike in different gear combinations. Shift through the entire range of gears to ensure the system is operating smoothly. If you experience hesitation or skipping, recheck the cable tension and adjust accordingly.

  • It’s recommended to fine-tune the tension over the course of several rides, as the cables may stretch slightly when first installed.

Troubleshooting Common Set-Up Issues

1. Sluggish Shifting or Hesitation

If you notice sluggish shifting, the most likely cause is insufficient cable tension. Double-check the barrel adjusters and ensure the cables are adequately lubricated. If the cables have stretched too much, you may need to replace them again after the first few rides.

2. Skipping Gears

Gear skipping is often a sign that the derailleur is not properly aligned or that the cable tension is too high. Inspect the derailleur alignment and ensure it is hanging straight. Adjust the cable tension using the barrel adjusters to eliminate any skipping issues.

3. Cables Slipping

Cables slipping at the derailleur anchor point could be caused by the bolt not being properly tightened. Ensure the anchor bolt is tightened to the manufacturer’s recommended torque specifications to prevent slipping. If slipping persists, check for damage to the derailleur or housing that may cause the cable to move incorrectly.

Customization and Optimization for Better Performance

Once you’ve successfully replaced the derailleur cables, you may want to make some adjustments to enhance your bike’s performance.

1. Clean and Lubricate the Cables

For long-lasting smooth shifting, it’s essential to clean and lubricate the derailleur cables regularly. A clean, well-lubricated cable moves more freely, resulting in better shifting response and less friction.

2. Fine-Tune the Shifting with AXS App

The SRAM Force eTap AXS D2 system is fully compatible with the AXS mobile app. Using this app, you can fine-tune shifting performance by adjusting the settings on the derailleurs. The app allows you to make precise adjustments to shifting performance, allowing for a personalized ride feel.

3. Use Higher-Quality Cables and Housing

To optimize performance, consider upgrading to higher-quality cables and housing. The Force eTap AXS D2 system is designed for smooth, efficient performance, and high-quality cables and housing can improve overall shifting reliability, especially in harsh conditions.

Comparison with Similar Models

While the Force eTap AXS D2 is one of the most advanced electronic shifting systems on the market, there are other systems that might suit different riders’ needs.

  • SRAM RED eTap AXS: The RED eTap AXS is a higher-end model that offers the same wireless shifting technology but with a lighter weight and more advanced materials. If weight savings and top-tier performance are priorities, the RED eTap AXS might be the better choice, but it comes at a premium price.
  • Shimano Ultegra Di2: Shimano’s Di2 system offers wired electronic shifting, which may appeal to those looking for a more traditional setup or those who prioritize reliability and ease of maintenance over the wireless convenience of SRAM’s eTap AXS system.

Both alternatives offer excellent performance, but the choice between them depends on factors such as budget, rider preference, and desired performance characteristics.

Understanding Compatibility with Other Drivetrain Components

The SRAM Force eTap AXS D2 (12-speed) system is designed to work with other SRAM AXS components. It is fully compatible with SRAM 12-speed cassettes and chainrings, and it works seamlessly with SRAM’s AXS app for fine-tuning.

However, when mixing components from different brands, be cautious of potential incompatibilities, particularly with Shimano or Campagnolo components. For the best shifting performance, it is always recommended to use components from the same brand (SRAM in this case) to ensure optimal compatibility.