Replacing the derailleur cables on your SRAM Apex XPLR [paid link] AXS (12-speed) is a critical maintenance task to keep your shifting smooth and responsive. Over time, cables can stretch, fray, or corrode, leading to poor shifting performance. This guide will walk you through the process of replacing the derailleur cables, ensuring your bike remains in top condition.
Tools Required
- 5mm Allen wrench
- 3mm Allen wrench
- Cable cutters
- Torque wrench (optional)
- Phillips screwdriver
- New derailleur cables
- New cable housing (optional, if needed)
- Lubricant or grease (optional)
- Zip ties or cable crimps (optional)
Preparation for Replacing the Cables
Before starting the replacement process, ensure your bike is clean and securely positioned on a work stand. Having all your tools within reach will streamline the process and ensure a smoother workflow.
- Shift the chain to the smallest chainring and the smallest cog on the cassette. This ensures the derailleur is in its most relaxed position and minimizes tension during cable removal.
- Disconnect the power source to your AXS derailleur by removing the battery, if necessary. This step is important to avoid accidental shifting or any interference with the derailleur during the replacement.
Removing the Old Derailleur Cables
- Loosen the Derailleur Bolts
Use a 3mm Allen wrench to loosen the bolt that secures the derailleur cable to the derailleur. This will allow you to remove the cable from the derailleur entirely. - Cut the Cable
Use cable cutters to cut the derailleur cable near the shifter. This will help in removing the cable from the cockpit area with minimal hassle. If you’re also replacing the housing, cut the cable near the entry point of the housing as well. - Remove Cable from the Shifter
With the cable detached from the derailleur, move up to the shifter. Use a 5mm Allen wrench to remove the bolt securing the cable at the shifter. Gently pull the cable through the shifter mechanism. If the cable housing is worn, it’s a good time to replace it as well. - Check the Cable Housing
Inspect the cable housing for any damage or excessive wear. If necessary, replace the housing by cutting it to the correct length. Ensure smooth cable movement by lubricating the inside of the housing lightly before installation.
Installing the New Derailleur Cables
- Feed the New Cable Through the Shifter
Begin by inserting the new derailleur cable through the shifter mechanism. Make sure it moves freely within the shifter and doesn’t get caught on any moving parts. - Route the Cable Through the Housing
Route the cable through the housing, ensuring it follows the same path as the original cable. Use cable ferrules where necessary to ensure smooth transitions at the ends of the housing. Lubricate the cable lightly to reduce friction and prolong its life. - Attach the Cable to the Derailleur
Now that the cable is routed and fed through the housing, reattach the cable to the derailleur. Tighten the derailleur’s cable bolt securely with a 3mm Allen wrench. It’s crucial that the cable is tight, but not overly so, as excessive tension can affect shifting performance. - Reinstall the Cable at the Shifter
At the shifter end, insert the cable into the designated slot and tighten the bolt to secure it in place. Make sure there is enough slack in the cable to allow for proper adjustment later.
Adjusting the Derailleur and Fine-tuning Shifting
- Adjust Cable Tension
Begin by checking the overall cable tension. Shift to the smallest chainring and cog and use the barrel adjuster to fine-tune the tension. The derailleur should move smoothly and with minimal hesitation. Adjust until the shifting feels crisp. - Test the Shifting Performance
Shift through all the gears, checking both upshifts and downshifts. Ensure that each shift is precise and that the derailleur moves through the entire cassette smoothly. If you notice any skipping or sluggish shifting, it may indicate the need for further tension adjustments or the replacement of the cable housing. - Trim Excess Cable
Once the cable is properly tensioned and shifting smoothly, trim any excess cable with cable cutters. Leave about 1-2 cm of slack at the end and secure it with a cable crimp or a zip tie. - Final Checks
Go through all the gears once more to double-check the shifting performance. If everything feels tight and responsive, you have successfully replaced and adjusted your derailleur cables.
Troubleshooting Common Issues
- Skipping Gears or Sticking Shifts
If the derailleur skips or shifts erratically, it may indicate improper cable tension or dirty cable housing. Recheck the tension and inspect the housing for any obstructions. - Cable Sticking in the Shifter
If you notice the cable sticking or not moving smoothly in the shifter, it may be a sign of a damaged or worn-out cable. Replacing the cable with a new one should resolve this issue. - Jumpy Shifting Under Load
If shifting becomes jumpy under load, ensure the derailleur hanger is properly aligned and that the cable is not frayed or sticking in the housing. Also, check that the derailleur jockey wheels are clean and moving freely.
Conclusion
Replacing the derailleur cables on your SRAM Apex XPLR AXS (12-speed) is a straightforward task that can significantly improve your bike’s shifting performance. By following this guide, you can ensure smooth, precise shifts for an optimized riding experience. Remember to adjust cable tension and test the shifting thoroughly to guarantee flawless operation. Regular maintenance of your cables and drivetrain will help extend the life of your bike and provide a more enjoyable ride.