How to Install, Adjust, and Maintain the XX Rear Derailleur

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in AXS, Rear Derailleur, SRAM

The XX Eagle Rear Derailleur is a high-performance component designed to deliver precise shifting and smooth drivetrain operation. Whether you are installing a new derailleur, fine-tuning adjustments, or performing routine maintenance, understanding the correct procedures is crucial.

This comprehensive guide will walk you through the installation, adjustment, and maintenance of the XX Rear Derailleur [paid link], ensuring your bike runs at peak efficiency. You’ll also find troubleshooting tips and expert advice to keep your shifting crisp and reliable.

Tools Required

Before you begin, gather the necessary tools:

  • 5mm Allen wrench [paid link]
  • Torque wrench [paid link] (with 4-6 Nm settings)
  • Phillips screwdriver
  • Chain tool
  • Cable cutters
  • Needle-nose pliers
  • Chain checker
  • Bike stand [paid link] (optional but recommended)

Step-by-Step Installation Guide

Proper installation is key to preventing shifting issues and premature wear. Follow these steps to correctly install the XX Rear Derailleur [paid link]:

1. Prepare the Drivetrain

  • Shift the chain onto the smallest rear cog to release cable tension.
  • Remove the old derailleur if replacing an existing unit.
  • Inspect the hanger alignment using a derailleur hanger alignment gauge. A bent hanger can cause shifting inconsistencies.

2. Mount the XX Rear Derailleur

  • Align the derailleur’s mounting bolt with the derailleur hanger.
  • Thread the bolt in by hand, ensuring it is not cross-threaded.
  • Torque the bolt to the manufacturer’s recommended 5-6 Nm to secure the derailleur.

3. Attach the Chain

  • If using a new chain, ensure it is properly sized by wrapping it around the largest chainring and the largest rear cog (bypassing the derailleur). Add two extra links for slack.
  • Use a chain tool or quick link to reconnect the chain.
  • Shift through the gears to confirm smooth movement.

4. Route and Secure the Cable

  • Insert the shift cable through the derailleur’s anchor bolt.
  • Pull the cable taut and secure it by tightening the anchor bolt to 5 Nm.
  • Cut excess cable, leaving about 3cm for future adjustments, and cap the end to prevent fraying.

Adjusting the XX Rear Derailleur

After installation, the derailleur must be adjusted to ensure precise shifting.

1. Set the Limit Screws

The high (H) and low (L) limit screws prevent the chain from shifting too far.

  • High Limit Screw (H) – Adjust so the derailleur aligns perfectly with the smallest cog.
  • Low Limit Screw (L) – Adjust so the derailleur aligns with the largest cog.

Test by manually shifting through the gears, ensuring the chain does not overshoot the cogs.

2. B-Tension Adjustment

The B-tension screw controls the derailleur’s clearance from the cassette.

  • Shift into the largest cog and adjust the B-screw so there is 5-6mm clearance between the guide pulley and the largest cog.

3. Fine-Tune Indexing

  • Shift into the second-smallest cog.
  • Use the barrel adjuster to fine-tune shifting. Turning it clockwise tightens cable tension (moves the derailleur outward), while turning it counterclockwise loosens cable tension (moves it inward).
  • Shift through all gears to confirm smooth and accurate transitions.

Routine Maintenance for Optimal Performance

Regular maintenance prevents wear and tear, extends the derailleur’s lifespan, and ensures smooth operation.

1. Cleaning and Lubrication

  • Use a degreaser to clean dirt and grime from the derailleur.
  • Lightly lubricate the pivots and jockey wheels with a high-quality chain lubricant.
  • Avoid excessive lubrication, as this can attract dirt.

2. Inspect for Wear

  • Check the jockey wheels for signs of wear or excessive play.
  • Inspect the shift cable for fraying or corrosion and replace if necessary.
  • Examine the derailleur hanger for alignment issues after any crash.

3. Chain and Cassette Wear Check

  • Use a chain checker tool to measure wear. Replace the chain if elongation exceeds 0.5%.
  • A worn chain accelerates cassette wear, so replace both if shifting becomes inconsistent.

Troubleshooting Common Issues

Problem: Slow or Inconsistent Shifting

Solution: Adjust the barrel adjuster to fine-tune cable tension. If shifting is still sluggish, check for dirt buildup or a bent hanger.

Problem: Chain Skipping or Slipping

Solution: Inspect for a worn chain or cassette. If components are in good condition, adjust the B-tension screw to optimize derailleur clearance.

Problem: Noise During Shifting

Solution: Clean and lubricate the jockey wheels and chain. Check for proper limit screw and indexing settings.

Conclusion

Proper installation, regular adjustments, and routine maintenance of the XX Rear Derailleur [paid link] ensure smooth, precise shifting and long-lasting drivetrain performance. Following this guide will help you maintain efficiency and avoid costly repairs.

For more troubleshooting tips, check out:
Why Your XX Rear Derailleur Might Not Be Set Up Correctly and How to Fix It

To extend the lifespan of your derailleur, read:
How to Prevent Premature Wear on Your XX Rear Derailleur and Extend Its Lifespan

For shifting optimization, see:
Maximizing Performance: How to Keep Your XX Rear Derailleur Running Like New