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

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in Campagnolo, Rear Derailleur, Super Record

The Campagnolo Super Record 12s [paid link] rear derailleur is one of the most advanced and precise shifting components available for high-performance road bikes. With its lightweight carbon fiber construction, optimized jockey wheels, and enhanced movement trajectory, it provides smooth and efficient gear changes under all conditions.

However, achieving optimal performance requires proper installation, precise adjustments, and regular maintenance. This guide will walk you through everything from setting up your Super Record 12s [paid link] derailleur to fine-tuning it for perfect shifting and keeping it in top condition for years to come.

Tools Required

Before beginning the installation, ensure you have the following tools ready:

  • 5mm hex key [paid link]
  • 2.5mm hex key [paid link] (for fine adjustments)
  • Torque wrench [paid link] with Nm settings
  • Phillips screwdriver
  • Chain tool (for proper chain length adjustment)
  • Cable cutters
  • Grease and chain lubricant
  • Clean rag or shop towels

Step-by-Step Installation of the Super Record 12s Rear Derailleur

1. Preparing the Frame and Hanger

Before mounting the derailleur, inspect the derailleur hanger for alignment. A bent hanger can cause shifting issues even with a perfectly set-up derailleur.

  • Use a hanger alignment tool to check for straightness.
  • Clean the mounting area to ensure a secure fit.
  • Lightly grease the derailleur mounting bolt threads to prevent seizing.

2. Mounting the Rear Derailleur

  • Align the B-knuckle (the upper pivot of the derailleur) with the hanger.
  • Secure the derailleur using a 5mm hex key [paid link] and tighten it to 8–10Nm of torque.

3. Installing the Chain and Determining Proper Length

For the Super Record 12s [paid link], chain length is crucial for smooth shifting.

  • Wrap the chain around the largest cassette cog and the largest chainring, bypassing the derailleur.
  • Add one full link to this measurement before cutting the chain.
  • Use a quick link or a Campagnolo chain pin to connect the chain.

4. Connecting and Adjusting the Cable

  • Shift the derailleur to the smallest cog before attaching the cable.
  • Thread the gear cable through the barrel adjuster and clamp it securely.
  • Use a torque wrench [paid link] to tighten the cable clamp bolt to 5–7Nm.

Fine-Tuning and Adjusting the Super Record 12s Rear Derailleur

1. Setting the High and Low Limit Screws

  • High limit screw (H-screw): Adjust it so the derailleur pulley aligns perfectly with the smallest cog.
  • Low limit screw (L-screw): Fine-tune it to ensure the derailleur does not shift past the largest cog.

2. Adjusting B-Tension for Proper Chain Wrap

The B-screw controls the distance between the upper jockey wheel and the cassette.

  • Shift into the largest cog and check the gap between the upper jockey wheel and the cassette.
  • Adjust the B-tension screw until there is 5-6mm of clearance.

3. Indexing the Shifting for Precise Gear Changes

If the derailleur does not shift smoothly, use the barrel adjuster:

  • Turn clockwise to reduce cable tension (if shifting is slow to downshift).
  • Turn counterclockwise to increase tension (if shifting is slow to upshift).

Maintenance and Longevity of the Super Record 12s Rear Derailleur

1. Cleaning and Lubrication

Regular cleaning ensures smooth operation and extends component lifespan.

  • Wipe down the derailleur after every ride with a clean, dry rag.
  • Every 500–1000 km, use a degreaser to clean jockey wheels and re-lubricate them with light oil.

2. Checking for Wear and Tear

Inspect the following every few months:

  • Jockey wheels for worn teeth. Replace if necessary.
  • Cable tension for frayed or stretched cables.
  • B-screw and limit screws to ensure they hold position correctly.

3. Replacing the Gear Cable for Optimal Performance

A worn-out gear cable can lead to sluggish shifting. To replace it:

  • Shift to the smallest cog and release the cable from the clamp.
  • Remove and replace the inner cable with a high-quality stainless-steel or polymer-coated alternative.
  • Reinstall and fine-tune the indexing.

Troubleshooting Common Super Record 12s Issues

1. Poor Shifting Performance

  • If the derailleur is slow to shift up the cassette, increase cable tension slightly.
  • If it’s slow to shift down the cassette, reduce cable tension.

2. Noisy Chain or Grinding Sounds

  • Check the B-screw adjustment; the jockey wheel may be too close to the cassette.
  • Ensure the chain is lubricated properly and not excessively dry.

3. Chain Skipping or Ghost Shifting

  • Inspect cable tension and adjust with the barrel adjuster.
  • Check the derailleur hanger for alignment issues.

Conclusion

Installing and maintaining the Super Record 12s [paid link] rear derailleur requires precision, but following these steps ensures smooth and reliable performance. With regular maintenance, correct adjustments, and timely replacements of worn components, your derailleur will deliver flawless shifting for thousands of kilometers.