DIY Rear Derailleur Adjustment for Ekar WRL Rear Derailleur on Gravel Bikes

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The Campagnolo Ekar WRL rear derailleur [paid link] is a crucial component of the Ekar 13-speed groupset designed specifically for gravel bikes. This derailleur offers precise shifting and durability under challenging off-road conditions. Proper installation, adjustment, and maintenance of this component can significantly enhance your riding experience. This guide will walk you through the steps needed to adjust the Ekar WRL rear derailleur for optimal performance, troubleshoot common setup issues, and discuss customization options.

Tools Required

  • 5mm Allen wrench
  • 2mm Allen wrench
  • Phillips screwdriver
  • Torque wrench (2-5Nm)
  • Chain checker tool
  • Cable cutter
  • Lubricant (light oil or grease)
  • Bicycle stand

Installing the Campagnolo Ekar WRL Rear Derailleur

Step 1: Prepare the Bike

Before installing the rear derailleur, ensure your gravel bike is securely placed in a bike stand. This will give you easy access to the drivetrain and prevent any unnecessary movements during the installation process.

Step 2: Mount the Rear Derailleur

  • Use a 5mm Allen wrench to attach the derailleur hanger to the derailleur body.
  • Ensure that the derailleur is mounted on the correct side of the hanger. The derailleur should sit perpendicular to the rear triangle, and the jockey wheels should line up with the cassette.
  • Tighten the bolt with the correct torque (2-5Nm) to avoid over-tightening.

Step 3: Install the Chain

  • With the derailleur in place, route the chain through the derailleur’s jockey wheels.
  • Make sure the chain is correctly threaded through the derailleur without causing any interference with the derailleur or the cassette. Follow the manufacturer’s instructions for the specific chain length.

Step 4: Attach the Cable

  • Install the rear derailleur cable through the cable housing and connect it to the derailleur.
  • Tighten the cable anchor bolt with a 2mm Allen wrench to ensure a secure connection.

Adjusting the Ekar WRL Rear Derailleur

Step 1: Set the B-Screw

The B-screw adjusts the distance between the derailleur’s jockey wheels and the cassette, ensuring smooth shifting.

  • To begin, shift the chain to the smallest cog and largest chainring.
  • Use a Phillips screwdriver to adjust the B-screw, ensuring the jockey wheels are about 6-8mm away from the largest cog. This distance ensures optimal shifting performance.

Step 2: Adjust High and Low Limit Screws

The high and low limit screws control the derailleur’s movement range, preventing it from shifting too far in either direction.

  • Shift the chain to the largest cog and the smallest chainring.
  • Adjust the high limit screw so that the derailleur cage is aligned with the smallest cog. Make small adjustments until you achieve smooth shifting.
  • Shift to the smallest cog and the largest chainring, and adjust the low limit screw so that the derailleur does not overshoot the smallest cog, ensuring it stays within its range.

Step 3: Tension the Cable

  • Shift the bike into the smallest cog and largest chainring, and check the cable tension.
  • If the derailleur struggles to shift to higher gears, tighten the cable slightly using the barrel adjuster. Conversely, if the derailleur shifts too quickly and misses cogs, loosen the cable tension slightly.
  • Fine-tune the cable tension until the derailleur shifts crisply between all cogs without hesitation.

Step 4: Test Shifting Across All Gears

Shift through all gears from the smallest to the largest and back again. Pay attention to how the derailleur behaves and ensure smooth transitions between each gear.

  • If the chain drops or skips, recheck the derailleur alignment and limit screw adjustments.

Troubleshooting Common Ekar WRL Rear Derailleur Issues

1. Skipping Gears or Hesitant Shifting

  • Cause: This is often a result of improper cable tension or worn chain.
  • Solution: Adjust the cable tension using the barrel adjuster or replace the chain if it’s too worn.

2. Derailleur Cage Overextends

  • Cause: If the derailleur cage moves too far inward or outward, it might be due to incorrectly set limit screws.
  • Solution: Revisit the high and low limit screw adjustments to ensure the derailleur moves within the proper range.

3. Noisy Shifting

  • Cause: This could be due to poor derailleur alignment or incorrect B-screw adjustment.
  • Solution: Recheck the B-screw to make sure the jockey wheels are positioned correctly in relation to the cassette. Additionally, inspect the derailleur hanger to ensure it is straight.

4. Dropped Chain

  • Cause: A dropped chain is often caused by improper chain length or a poorly tensioned derailleur.
  • Solution: Ensure the chain is properly sized and that the derailleur has the correct amount of tension.

Customizing the Ekar WRL Rear Derailleur for Better Performance

Adjusting the Jockey Wheels

The jockey wheels of the Ekar WRL derailleur are crucial for smooth, quiet shifting. Upgrading to ceramic or lightweight jockey wheels can reduce friction, resulting in smoother and faster shifts. However, ensure that the new wheels are compatible with the Ekar system before purchasing.

Upgrading the Shift Cable

A high-quality shift cable made of stainless steel or coated cables can improve the overall shifting performance of your Ekar WRL rear derailleur. These cables offer better longevity and smoother shifting in both wet and dry conditions.

Fine-tuning the B-Screw for Gravel Riding

Gravel riding often involves shifts under load and at varying chainring and cog combinations. Experiment with minor adjustments to the B-screw to find the optimal distance between the derailleur and the cassette for better chain management during rugged rides.

Compatibility with Other Drivetrain Components

The Campagnolo Ekar WRL rear derailleur is designed to work exclusively with the Ekar 13-speed groupset, ensuring precise shifting and compatibility. It is not compatible with other Campagnolo drivetrains, such as the Chorus or Record groupsets, due to different cable pull ratios and internal mechanisms.

However, the Ekar WRL can be paired with other Campagnolo components, such as the Ekar 13-speed cassette and the Ekar crankset, to create a fully optimized gravel bike drivetrain. It’s essential to ensure all components within the system are designed for 13-speed compatibility to avoid shifting issues.

Conclusion

Adjusting and maintaining the Campagnolo Ekar WRL rear derailleur on your gravel bike is a straightforward process with the right tools and adjustments. By following the steps outlined in this guide, you can ensure that your rear derailleur performs at its best, allowing for smooth and reliable shifting during all types of gravel rides. Regular maintenance and fine-tuning will also enhance the lifespan of your drivetrain, ensuring that your bike is ready for any adventure.