DIY Guide to Replacing Derailleur Cables for Force XPLR eTap AXS

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Replacing derailleur cables on the SRAM Force XPLR eTap AXS [paid link] is an essential maintenance task that ensures smooth shifting performance and keeps your bike running optimally. Whether you’re experiencing sluggish shifts or the cables are simply worn out, replacing them is a straightforward process that can be done at home with the right tools and techniques. This guide will take you through each step of the process, from preparing your bike to fine-tuning your shifting after the replacement.

Tools Required:

  • 5mm Allen wrench
  • 3mm Allen wrench
  • Cable cutters
  • Torque wrench
  • New derailleur cables (SRAM-specific for eTap AXS)
  • Small flathead screwdriver (optional for cable tension adjustments)
  • Cable lubricant (optional)
  • Electrical tape (optional)

Preparing for the Replacement

Before beginning the replacement of the derailleur cables on your SRAM Force XPLR eTap AXS, ensure that the bike is stable and secure. A work stand is ideal, but if one is unavailable, propping the bike upside down or using a stable surface will also work. You will need to ensure that your bike is in a position that allows easy access to the drivetrain and derailleur components.

Step 1: Remove the Old Derailleur Cables

  1. Shift to the Smallest Gear: Shift your bike into the smallest chainring and rear cog to relieve tension on the derailleur cables. This will make the cable removal easier and safer.
  2. Disconnect the Battery: SRAM’s eTap AXS system uses electronic shifting, so it is crucial to disconnect the battery before working with the cables. Open the battery compartment, remove the battery, and safely set it aside.
  3. Loosen the Derailleur Bolt: Using a 5mm Allen wrench, loosen the derailleur mounting bolt and gently remove the derailleur from the frame. This step will give you better access to the derailleur cable entry points.
  4. Release Cable Tension: Using the 3mm Allen wrench, adjust the barrel adjuster on the derailleur to loosen the tension on the derailleur cable. You can also manually unthread the cable if it is already loose enough.
  5. Remove the Cable from the Derailleur: Locate the cable anchor bolt on the derailleur. Using the appropriate tool (usually a 3mm Allen wrench), loosen the anchor bolt and remove the cable from the derailleur. Be careful not to damage the cable housing or the derailleur itself.
  6. Remove the Cable from the Shifter: Next, release the cable from the shifter. This step will involve undoing the cable retention system in the shifter. Follow SRAM’s specific guidelines for releasing the cable from the eTap AXS shifter. You may need to remove any cable clips or covers before pulling the cable free.

Step 2: Install the New Derailleur Cables

  1. Prepare the New Cable: Start by cutting your new derailleur cable to the proper length. A new cable should be slightly longer than the old one, but you can trim it as needed. Use cable cutters to ensure the cable ends are clean and precise.
  2. Lubricate the Cable (Optional): It’s a good idea to apply a small amount of lubricant to the new cable to reduce friction and ensure smoother shifting. This step is optional but can improve the longevity of the cable.
  3. Thread the Cable through the Housing: Insert the new cable into the housing. Ensure the cable housing is not cracked or damaged. The housing should be routed smoothly without sharp bends to ensure the cable moves freely.
  4. Install the Cable in the Shifter: Insert the cable into the shifter mechanism, following the specific instructions for your SRAM Force XPLR eTap AXS shifter. Ensure that the cable is seated properly in the internal mechanism and secure it by tightening any cable retention bolts or clamps as necessary.
  5. Thread the Cable through the Derailleur: Now, thread the cable through the derailleur. Attach the cable to the derailleur’s anchor bolt, tightening the bolt securely with a 3mm Allen wrench. Make sure the cable is running smoothly without any tangles or bends.
  6. Reinstall the Derailleur: Reinstall the derailleur on the hanger, ensuring the derailleur is positioned correctly. Tighten the derailleur mounting bolt with a 5mm Allen wrench to the manufacturer’s recommended torque setting (typically around 8–10 Nm).

Step 3: Adjust Cable Tension and Fine-Tuning

  1. Set the Initial Cable Tension: Using the barrel adjuster on the derailleur, set the initial tension of the new cable. A good starting point is to make sure the chain moves smoothly across the cassette when shifting. Make small adjustments to the barrel adjuster to achieve smooth, accurate shifts.
  2. Reconnect the eTap Battery: Once the derailleur is reinstalled and the cable is properly tensioned, reconnect the eTap AXS battery. Ensure the connections are secure, and the battery is fully inserted into the compartment.
  3. Test the Shifting: Activate the eTap shifter to check that the derailleur moves freely across all gears. Shift through the cassette in both directions to ensure the derailleur is responding correctly. Fine-tune the tension using the barrel adjuster until the shifting is crisp and accurate.
  4. Test for Smooth Operation: Ride the bike around and test the shifting under load. Make sure the chain transitions smoothly between gears without skipping, slipping, or hesitating. If needed, make additional adjustments to the cable tension or the position of the derailleur.

Troubleshooting Common Issues

  • Skipping Gears: If the bike skips gears or fails to shift smoothly, the cable may be too loose or too tight. Adjust the barrel adjuster to fine-tune the tension.
  • Sticky Shifting: If the shifting feels sticky or unresponsive, the cable may be binding in the housing. Check for any sharp bends or kinks in the cable housing, and replace it if necessary.
  • Uneven Shifting: If shifting is inconsistent across the cassette, ensure the derailleur hanger is straight and the derailleur is properly aligned. Misalignment can cause poor shifting performance.

Conclusion

Replacing the derailleur cables on your SRAM Force XPLR eTap AXS is a crucial task for maintaining smooth, reliable shifting performance. By following the steps outlined in this guide, you can ensure that your bike is always ready for your next ride. Regular maintenance, proper cable installation, and adjustments will not only extend the lifespan of your components but also improve your overall riding experience.