How to Install, Adjust, and Maintain the Record EPS 11s Rear Derailleur

The Campagnolo Record EPS 11s [paid link] rear derailleur is a high-performance electronic shifting component designed for precision and reliability. As part of Campagnolo’s Electronic Power Shift (EPS) system, this derailleur offers smooth, consistent shifting across an 11-speed cassette, making it a top choice for competitive cyclists and enthusiasts who demand the best.

Proper installation, adjustment, and maintenance of the Record EPS 11s [paid link] rear derailleur are crucial for optimal performance and longevity. This guide provides a detailed, step-by-step approach to help you set up, fine-tune, and maintain your derailleur to ensure flawless shifting.


Tools Required

Before starting the installation, ensure you have the following tools:


1. Understanding the Campagnolo Record EPS 11s Rear Derailleur

The Record EPS 11s [paid link] rear derailleur features electronic actuation, meaning shifting is controlled via a motorized system rather than mechanical cables. Some key features include:

  • Waterproof and durable design (IP67-rated)
  • Multi-shift capability for quick gear changes
  • High-torque motor for precise movement under load
  • Carbon fiber and alloy construction for lightweight strength

Since it is part of the EPS ecosystem, it must be correctly integrated with the Campagnolo EPS power unit and interface for proper functionality.


2. Step-by-Step Installation of the Record EPS 11s Rear Derailleur

2.1. Mounting the Rear Derailleur

  1. Position the derailleur hanger – Ensure it is straight using a derailleur hanger alignment tool. Any misalignment can cause shifting issues.
  2. Attach the derailleur to the hanger – Using a 5mm Allen wrench [paid link], secure the derailleur onto the hanger, tightening to 8-10Nm torque.
  3. Connect the EPS wire – Plug the EPS wiring harness into the derailleur. Ensure the connector is fully seated and waterproofed.

2.2. Connecting to the EPS System

  1. Route the wiring – Securely run the EPS wires along the frame to the power unit. Avoid sharp bends that can cause wire damage.
  2. Plug into the interface unit – Connect the derailleur to the EPS interface box, ensuring a firm and secure connection.

2.3. Chain Installation and Setup

  1. Install the chain – Use a compatible Campagnolo 11-speed chain and ensure it is properly sized.
  2. Join the chain – Use a Campagnolo chain tool to install the chain pin or quick link.
  3. Position the derailleur – Manually position the derailleur in the smallest cog to prepare for calibration.

3. Adjusting the Record EPS 11s Rear Derailleur for Optimal Shifting

3.1. Initial Setup and Calibration

  1. Turn on the EPS system – Press the power button on the EPS interface to activate the system.
  2. Enter adjustment mode – Hold down the mode button on the EPS interface until the LED blinks.
  3. Fine-tune indexing – Use the EPS buttons to micro-adjust the derailleur position for perfect gear alignment.
  4. Confirm shifting accuracy – Shift through all 11 gears to ensure smooth transitions without skipping.

3.2. Adjusting the Limit Screws

  • H-Limit (High Gear Screw): Ensures the chain doesn’t overshoot the smallest cog.
  • L-Limit (Low Gear Screw): Prevents the chain from shifting beyond the largest cog.

Use a small Phillips screwdriver to make fine adjustments, ensuring a smooth transition between gears without excess movement.


4. Troubleshooting Common Set-Up Issues

4.1. Shifting Feels Delayed or Sluggish

  • Check battery charge – A low battery can slow down shifts. Recharge the EPS battery if needed.
  • Verify derailleur alignment – Ensure the derailleur hanger is straight.
  • Recalibrate the system – Use the EPS interface to fine-tune the indexing.

4.2. Chain Skipping or Unstable Shifting

  • Check chain wear – A worn chain can cause inconsistent shifts. Replace if necessary.
  • Inspect cassette condition – Worn-out cassette teeth can lead to poor engagement.
  • Adjust limit screws – Ensure the derailleur is not over-shifting past the cogs.

5. Maintenance Tips to Keep Your Record EPS 11s Running Smoothly

5.1. Cleaning and Lubrication

  • Use a soft brush to remove dirt buildup on the derailleur.
  • Apply a light lubricant to the derailleur pivots to maintain smooth operation.
  • Avoid high-pressure water spray, which can force water into the EPS system.

5.2. Battery Maintenance and Storage

  • Charge the battery regularly to prevent power loss during rides.
  • Store the bike in a dry, cool place to protect the electronic components.
  • Perform periodic firmware updates via the Campagnolo MyCampy app.

6. Comparing the Record EPS 11s with Other Models

The Record EPS 11s sits below the Super Record EPS but offers nearly identical performance at a lower weight penalty. Compared to mechanical Record 11-speed derailleurs, the EPS system provides:

  • Faster, more precise shifting under load.
  • No cable stretch issues, reducing the need for frequent adjustments.
  • Electronic micro-adjustments for precise gear alignment.

Conclusion

The Campagnolo Record EPS 11s rear derailleur is a high-performance component that requires careful installation, fine-tuned adjustments, and regular maintenance for optimal shifting. By following this guide, you can ensure your derailleur performs flawlessly, providing smooth and reliable shifting on every ride.