How to Install, Adjust, and Maintain the Campagnolo Chorus HO 11s Rear Derailleur

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in Campagnolo, Chorus, Rear Derailleur

The Campagnolo Chorus HO 11s [paid link] rear derailleur is a high-performance component designed for precise, reliable shifting in an 11-speed drivetrain. Featuring Campagnolo’s advanced HO (Hydraulic Optimization) design, this derailleur ensures smooth operation on both standard and disc-brake road bikes.

To get the best performance from your Chorus HO 11s [paid link], proper installation, fine-tuned adjustment, and regular maintenance are essential. In this guide, we’ll cover everything you need to know—from installing your derailleur to keeping it in peak condition for years of crisp, smooth shifting.

Tools Required [paid links]

Step-by-Step Installation Guide

1. Preparing the Frame and Hanger

Before installing your Chorus HO 11s [paid link], ensure that the rear derailleur hanger is properly aligned. A misaligned hanger can cause inconsistent shifting and poor performance.

  • Use a derailleur hanger alignment tool to check for any bends.
  • If necessary, gently realign the hanger to ensure it is perfectly straight.
  • Clean the hanger threads and apply a small amount of grease before attaching the derailleur.

2. Mounting the Rear Derailleur

  • Position the B-knuckle of the derailleur onto the hanger.
  • Insert the fixing bolt and tighten it using a 5mm Allen key to 8-10Nm torque.
  • Ensure the derailleur sits securely without excessive movement.

3. Installing the Chain

Campagnolo drivetrains require specific chain sizing and installation:

  • Wrap the chain around the largest rear cog and the largest front chainring, bypassing the derailleur.
  • Pull the chain tight and add two full links (one inner and one outer link).
  • Use a Campagnolo chain tool to install the Ultra-Link pin and peen it properly.

4. Attaching the Shifter Cable

  • Shift the derailleur into the smallest cog.
  • Thread the cable through the cable anchor bolt and pull it taut.
  • Secure the bolt using a 4mm Allen key at a torque of 5-6Nm.

5. Setting the Limit Screws

  • H-Limit (High Gear) Screw: Adjust so the upper pulley aligns with the smallest cog.
  • L-Limit (Low Gear) Screw: Adjust so the pulley aligns with the largest cog without overshooting.

6. B-Screw Adjustment (Distance from Cassette)

  • The B-screw controls the derailleur’s distance from the cassette.
  • Rotate the screw to maintain a 2-5mm gap between the upper pulley and the largest cog.

Fine-Tuning the Adjustment for Perfect Shifting

1. Indexing the Shifting

  • Shift into the second smallest cog and turn the barrel adjuster until shifting is crisp.
  • Test each gear and adjust the barrel as needed to fine-tune the indexing.

2. Checking for Chain Rub and Ghost Shifting

  • If the chain struggles to shift up, turn the barrel adjuster counterclockwise.
  • If the chain hesitates to shift down, turn it clockwise.

3. Ensuring Proper Alignment with the Cassette

  • Visually inspect that the derailleur cage remains parallel to the cassette.
  • If shifting feels inconsistent, realign the derailleur by fine-tuning cable tension.

Maintenance Tips for Long-Term Performance

To keep your Campagnolo Chorus HO 11s rear derailleur in top condition, follow these essential maintenance practices:

1. Cleaning the Derailleur

  • Wipe down the derailleur after every ride using a lint-free cloth.
  • For deep cleaning, use a degreaser and a small brush to remove dirt buildup.

2. Lubrication

  • Apply dry or wet lubricant (depending on conditions) to the pivot points and jockey wheels.
  • Avoid over-lubricating, as excess oil attracts dirt and grime.

3. Checking for Wear and Tear

  • Inspect jockey wheels for signs of excessive wear or loose bearings.
  • Check the derailleur hanger alignment every few months, especially after crashes.

4. Replacing the Cable and Housing

  • If shifting feels sluggish, replace the shift cable and housing every 6-12 months.
  • Use only Campagnolo-approved cables for the best compatibility.

Common Installation and Adjustment Issues

1. Poor Shifting Performance

  • Ensure the cable tension is correct and the derailleur hanger is straight.
  • Check for frayed cables or contaminated housing.

2. Chain Skipping on Cogs

  • A worn chain or cassette can cause skipping.
  • Replace the chain if it’s stretched beyond 0.5% wear.

3. Noisy Shifting in Certain Gears

  • Re-index the derailleur using the barrel adjuster.
  • Check that the limit screws are properly set.

Conclusion

A properly installed and well-maintained Campagnolo Chorus HO 11s rear derailleur will deliver precise shifting and smooth performance for thousands of miles. By following this guide, you can ensure your derailleur functions flawlessly—whether you’re riding in a local crit race or tackling long endurance miles.

Frequently Asked Questions (FAQs)

1. How often should I adjust my Campagnolo Chorus HO 11s rear derailleur?
You should check and fine-tune the shifting every 500-1000 miles, or whenever you notice performance issues.

2. Can I install a Campagnolo Chorus HO 11s rear derailleur on a disc-brake bike?
Yes, the HO (Hydraulic Optimization) design ensures compatibility with disc-brake frames.

3. What cassette sizes work with the Chorus HO 11s rear derailleur?
It is compatible with 11-speed cassettes up to a 32T large cog.

4. What is the recommended torque for the derailleur fixing bolt?
Tighten the fixing bolt to 8-10Nm using a torque wrench [paid link].

5. Why does my shifting feel sluggish after a ride in the rain?
Water and dirt can enter the cable housing. Dry and lubricate the system to restore performance.

6. Can I use a non-Campagnolo chain with my Chorus HO 11s derailleur?
While possible, it is not recommended. Campagnolo chains are specifically designed for their drivetrains.