The Technology Behind Ekar 13 RD Rear Derailleurs

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The Campagnolo Ekar 13 RD [paid link] is a standout in the world of road cycling, particularly for riders looking for a durable and efficient drivetrain. As the rear derailleur in Campagnolo’s 13-speed Ekar groupset, it is built for precision and reliability in all conditions, whether on smooth tarmac or more rugged terrain. In this article, we will dive deep into the installation, maintenance, troubleshooting, and optimization of the Ekar 13 RD, as well as compare it to other options to help you determine if it’s the best fit for your bike.

Installation of the Ekar 13 RD Rear Derailleur

The installation of the Campagnolo Ekar 13 RD is a relatively straightforward process, but it requires attention to detail for optimal performance. Follow these steps to correctly install the rear derailleur.

Tools Required:

  • 5mm Allen key
  • 2.5mm Allen key
  • Torque wrench (3-5 Nm for the derailleur hanger bolt)
  • Chain tool
  • Cable cutter
  • Campagnolo-specific inner cable (or similar compatible cable)
  • 13-speed cassette (compatible with Ekar groupset)

Step-by-Step Installation:

  1. Prepare the Rear Derailleur Hanger: Ensure the derailleur hanger on the frame is aligned and free from any damage. A misaligned hanger can affect shifting performance.
  2. Attach the Derailleur to the Hanger: Use the 5mm Allen key to securely fasten the rear derailleur to the derailleur hanger. Tighten it with a torque wrench to the manufacturer’s recommended torque setting (3-5 Nm).
  3. Install the Cassette: Slide the 13-speed cassette onto the freehub body. Make sure the cassette is fully seated and lock it in place with the lockring. Torque the lockring to the recommended setting.
  4. Thread the Derailleur Cable: Starting from the shifter, thread the derailleur cable through the frame, ensuring it passes through all cable guides and enters the rear derailleur.
  5. Attach the Cable to the Derailleur: Use the 2.5mm Allen key to secure the cable in the derailleur’s cable clamp.
  6. Set the Limit Screws: Adjust the limit screws on the derailleur to ensure proper shifting range without the chain overshooting into the spokes or dropping off the cassette.

Adjustment and Fine-Tuning

Once installed, you will need to adjust the Ekar 13 RD to ensure smooth and precise shifting across the entire cassette.

Rear Derailleur Cage and Chain Length:

  • Ensure that the derailleur cage is properly tensioned, and check that the chain is the correct length. For optimal shifting performance, the chain should neither be too loose nor too tight. It should have just enough slack to allow the derailleur to move freely across all cogs.

Fine-Tuning the Indexing:

  • With the derailleur installed and the cable tensioned, use the shifter to check that the derailleur moves smoothly from the smallest to the largest cog. Adjust the barrel adjuster to fine-tune the cable tension if shifting is sluggish or misaligned. Ensure the derailleur moves smoothly and accurately between gears.

Fine-Tuning Limit Screws:

  • Ensure the high and low limit screws are set properly to prevent the derailleur from shifting past the smallest or largest cogs. This is crucial to avoid the chain dropping off or the derailleur going into the spokes or frame.

Maintenance of the Ekar 13 RD Rear Derailleur

Regular maintenance of your Ekar 13 RD will ensure it continues to perform at its best for years. The following maintenance tips will help keep the derailleur in top condition.

Cleaning:

  • Regularly clean the derailleur, removing any dirt, debris, and grease. Use a degreaser on the derailleur’s jockey wheels and the cage to prevent build-up of gunk, which can hinder performance.
  • Lubricate the jockey wheels lightly with chain lube to keep them running smoothly.

Cable Tension:

  • Over time, cable tension can loosen due to natural wear. It’s important to regularly check and adjust the cable tension using the barrel adjuster on the derailleur to ensure smooth shifting.

Check the Derailleur for Wear:

  • Regularly inspect the derailleur for signs of wear, including the jockey wheels, cage, and derailleur body. Replace any worn parts to maintain optimal performance.

Lubrication:

  • Lubricate the pivot points on the derailleur to ensure smooth movement. Apply grease to the bolt that attaches the derailleur to the hanger to prevent corrosion and facilitate easier removal when necessary.

Troubleshooting Common Issues with the Ekar 13 RD

Even the best drivetrains can encounter problems from time to time. Here are some common issues you might face with the Ekar 13 RD and how to resolve them.

Skipping or Hesitant Shifting:

  • Possible Cause: Incorrect cable tension or misaligned derailleur.
  • Solution: Check the cable tension and make necessary adjustments using the barrel adjuster. If shifting is still sluggish, inspect the derailleur hanger for alignment.

Chain Drops or Fails to Shift to Larger Cogs:

  • Possible Cause: Limit screws incorrectly set or chain too short.
  • Solution: Adjust the limit screws to ensure the derailleur does not overshoot the cogs. Check the chain length to ensure it’s long enough to accommodate the largest cog.

Grinding Noise When Shifting:

  • Possible Cause: Worn jockey wheels or dirty derailleur.
  • Solution: Clean and lubricate the derailleur, paying close attention to the jockey wheels. If the noise persists, inspect the jockey wheels for wear and replace them if necessary.

Customization and Optimization for Better Performance

The Campagnolo Ekar 13 RD offers several opportunities for customization and optimization to better suit your riding style and preferences.

Adjusting Shifting Speed:

  • By fine-tuning cable tension, you can alter the speed of shifting. A tighter cable will result in faster shifting, while a looser cable will slow down the shifting process. Adjust according to your preference for more responsive or more gradual shifts.

Upgrade to Ceramic Bearings:

  • For smooth and efficient shifting, consider upgrading the derailleur’s jockey wheels to ceramic bearings. This reduces friction, which can improve performance and longevity.

Optimizing for Off-Road Riding:

  • The Ekar 13 RD is designed with gravel and mixed-terrain riding in mind. You can optimize it further by pairing it with a wider-range cassette for tackling steep inclines or rough trails.

Comparison with Other Rear Derailleurs

When compared to other rear derailleurs on the market, particularly in the gravel and adventure category, the Campagnolo Ekar 13 RD holds a strong position due to its unique features.

Campagnolo Ekar 13 RD vs SRAM Force eTap AXS 12-speed:

  • Weight: The Ekar 13 RD is slightly heavier than the SRAM Force eTap AXS, but this is counterbalanced by its exceptional durability and wider gearing range suited for gravel riding.
  • Performance: Both systems provide precise shifting, but the Ekar 13 RD shines in rough conditions, offering more robustness and reliability when subjected to dirt and debris.

Campagnolo Ekar 13 RD vs Shimano GRX Di2 11-speed:

  • Technology: Shimano GRX Di2 uses electronic shifting, which provides a smooth and effortless experience, but the Ekar 13 RD’s mechanical setup offers simplicity and lower maintenance.
  • Compatibility: Shimano’s GRX is designed for 11-speed systems, whereas the Campagnolo Ekar 13 RD is a 13-speed system, making it a better option for riders looking for a wider gear range without the complexity of electronic components.

Understanding Compatibility with Other Drivetrain Components

The Campagnolo Ekar 13 RD is part of a 13-speed mechanical groupset, and understanding its compatibility with other drivetrain components is essential for a successful setup.

Cassette Compatibility:

  • The Ekar 13 RD is designed to work specifically with the Campagnolo Ekar 13-speed cassette. It may not be compatible with other 13-speed cassettes from different brands due to variations in cog spacing and freehub body design.

Chain Compatibility:

  • The Ekar system uses a Campagnolo-specific 13-speed chain, which is optimized for its drivetrain. Attempting to use a non-Ekar chain could result in poor shifting performance and reduced longevity.

Crankset and Chainring Compatibility:

  • The Campagnolo Ekar 13 RD is designed to work with the Campagnolo Ekar crankset, which features a 1x drivetrain setup. This setup is optimal for gravel and off-road cycling, offering a single chainring that complements the 13-speed cassette range.

By understanding these aspects of compatibility, riders can ensure that their Ekar 13 RD works seamlessly with other components, ensuring smooth performance and long-term durability.