How to Install, Adjust, and Maintain the Super Record EPS 12s Rear Derailleur

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in Campagnolo, Rear Derailleur

The Campagnolo Super Record EPS 12s [paid link] rear derailleur is a high-performance electronic shifting component designed for precision, speed, and reliability. As one of the most advanced rear derailleurs in the market, it offers seamless shifting across 12-speed cassettes while maintaining Campagnolo’s hallmark smoothness.

Proper installation, adjustment, and maintenance of this derailleur are critical to ensuring flawless shifting and extending its lifespan. In this guide, we will take an in-depth look at how to set up, tune, and care for your Super Record EPS 12s [paid link] rear derailleur, troubleshoot common issues, and optimize its performance.

Tools Required [paid links]

Before starting, gather the following tools and materials:

  • Allen Keys
  • Torque wrench (for precise tightening)
  • Campagnolo EPS V4 power unit and interface unit
  • Campagnolo USB interface (for firmware updates and diagnostics)
  • Chain whip and cassette lockring tool [paid link]
  • Bicycle work stand (recommended for stability)
  • Isopropyl alcohol and clean cloth (for cleaning contact points)
  • Dielectric grease (for electronic connections)
  • High-quality chain lubricant

Step 1: Installing the Super Record EPS 12s Rear Derailleur

1.1 Mounting the Derailleur

  • Ensure the hanger is straight using a derailleur alignment tool. A misaligned hanger can cause shifting issues.
  • Use a 5mm hex key [paid link] to attach the derailleur to the hanger, tightening it to 8–10 Nm using a torque wrench [paid link].
  • Confirm that the B-screw is in the correct position for your cassette size before proceeding.

1.2 Connecting the EPS System

  • Attach the EPS V4 power unit to the frame in a secure location. This unit is responsible for supplying power to the system.
  • Route the electronic wiring carefully along the frame, ensuring that cables are secured with frame clips to avoid damage.
  • Connect the rear derailleur wire to the EPS system, ensuring a snug fit in the junction box.

1.3 Attaching the Chain

  • Use a 12-speed Campagnolo chain and cut it to the correct length. The length should be checked using the largest cog and the big chainring combination.
  • Use a Campagnolo chain tool to properly install the Ultra-Link connecting pin.
  • Apply a small amount of lubrication to the chain to ensure smooth operation.

Step 2: Adjusting the Super Record EPS 12s Rear Derailleur

2.1 Initial Set-Up via EPS System

  • Turn on the EPS system by pressing and holding the mode button on the interface unit.
  • Use the Micro-Adjust feature to fine-tune the derailleur position. This is done by entering adjustment mode and shifting through the cassette while making precise corrections.

2.2 Limit Screw Adjustments

  • The Super Record EPS 12s [paid link] does not use traditional high and low limit screws but relies on electronic calibration to set the derailleur’s range.
  • Perform initial derailleur positioning via the Campagnolo MyCampy app or with the EPS interface unit.
  • Use the EPS fine-tuning mode to make small adjustments, ensuring the derailleur does not overshoot the largest or smallest cogs.

2.3 Setting the B-Tension (Rear Derailleur Body Position)

  • Adjust the B-screw to set the correct distance between the top jockey wheel and the largest cassette cog. This ensures optimal chain wrap and shifting speed.
  • Proper adjustment helps with crisp shifting and prevents excessive drivetrain noise.

Step 3: Maintaining the Super Record EPS 12s Rear Derailleur

3.1 Cleaning the Derailleur

  • Wipe down the derailleur with a clean, dry cloth after every ride to remove dirt and grime.
  • Use isopropyl alcohol to clean the jockey wheels and derailleur body, avoiding water exposure on electronic components.
  • Apply a light layer of lubrication to the jockey wheels for smoother performance.

3.2 Battery and Firmware Updates

  • Charge the EPS V4 battery regularly to avoid unexpected shifting failures.
  • Use the Campagnolo USB interface to check for firmware updates, ensuring that your derailleur is running the latest software for improved functionality.

3.3 Checking for Wear and Tear

  • Inspect the jockey wheels for wear and replace them when necessary.
  • Ensure electronic connectors are free of corrosion by applying dielectric grease periodically.
  • Check the derailleur mounting bolt and alignment to prevent misalignment from road vibrations.

Troubleshooting Common Issues with the Super Record EPS 12s Rear Derailleur

4.1 Inconsistent or Slow Shifting

  • Ensure that the battery is fully charged and that all electrical connections are properly seated.
  • Use the EPS micro-adjustment mode to fine-tune derailleur positioning.

4.2 Noisy Shifting or Chain Skipping

  • Check if the chain is properly lubricated and free of contamination.
  • Verify that the B-tension screw is correctly adjusted.
  • Ensure the cassette and chain are not excessively worn, as worn components can cause skipping.

4.3 The Derailleur Is Not Responding to Shift Commands

  • Reset the EPS system by turning it off and on again.
  • Check for loose connections in the wiring.
  • Connect the EPS system to the MyCampy app for diagnostics and error code analysis.

Final Thoughts: Optimizing Performance for Longevity

The Super Record EPS 12s rear derailleur is a pinnacle of modern shifting technology. When installed and maintained correctly, it delivers flawless shifting, rapid response times, and long-lasting durability.

By following this guide, you can ensure your EPS system remains in peak condition, giving you smooth, precise shifting on every ride. Regular maintenance and firmware updates will keep it performing at its best, allowing you to focus on the ride rather than your drivetrain.