How to Install, Adjust, and Maintain the Chorus 12s Ergopower Shifters

The Campagnolo Chorus 12s Ergopower [paid link] shifters are high-performance components that allow cyclists to enjoy smooth and precise shifting on their road bikes. Whether you’re a seasoned mechanic or a beginner, understanding how to properly install, adjust, and maintain these shifters is crucial to ensure optimal performance.

In this article, we’ll provide a detailed guide that covers everything you need to know about working with Chorus 12s Ergopower [paid link] shifters, from installation to long-term maintenance.

Tools Required

Before diving into the installation, adjustment, and maintenance process, gather the following tools to ensure smooth execution:

Allen wrenches [paid link] (3mm, 5mm, and 6mm)
Phillips head screwdriver
Torque wrench [paid link] (for precise torque specifications)
Cable cutters
Crankset remover (for removal of cranks if necessary)
Chain checker (for checking chain wear)
Lubricants (for cables and pivot points)
Campagnolo-specific cable ferrules
Campagnolo chain tool (if replacing the chain)
Plastic or wooden handle hammer (for adjusting parts without damaging them)

Installing the Campagnolo Chorus 12s Ergopower Shifters

Installing your Chorus 12s Ergopower [paid link] shifters correctly is crucial for ensuring optimal shifting performance. This installation process involves attaching the shifters to the handlebars, setting up the brake and gear cables, and making sure everything functions properly.

Step 1: Prepare Your Handlebars

Start by ensuring your handlebars are clean and free of any debris. If you are replacing old shifters, remove them first and clean the area where the new shifters will be mounted.

Step 2: Mount the Shifters

Slide the shifters onto the handlebars. Position them at a comfortable angle for your riding style.
Tighten the bolts using a 5mm Allen wrench [paid link]. Ensure that both shifters are placed evenly to maintain symmetry.
Use a torque wrench [paid link] to tighten the bolts to the recommended torque specification (usually around 6-8 Nm).

Step 3: Install the Brake Levers

Align the brake levers with the shifter levers on the Chorus Ergopower units.
Tighten the brake lever bolts with a 5mm Allen wrench [paid link]. Be sure to follow the manufacturer’s specifications for torque settings.

Step 4: Run the Cables

For the brake cable: Feed the brake cable through the barrel adjuster and into the brake arm.
For the gear cable: Carefully run the gear cable through the shifter housing and attach it to the derailleur.
Ensure the cables are not twisted and have a smooth routing.

Step 5: Attach the Cables to the Derailleur and Brakes

Secure the brake cable to the brake caliper using the barrel adjuster.
Attach the gear cable to the derailleur with the appropriate ferrule, and make sure the cable is taut.

Adjusting the Chorus 12s Ergopower Shifters

After installing your shifters, fine-tuning their performance is key. Correct adjustments will ensure smooth shifting, precise braking, and an overall comfortable ride.

Step 1: Set the Gear Cable Tension

Adjusting the gear cable tension is one of the first steps to ensure smooth shifting.

Shift into the smallest cog (rear gear) and ensure that the derailleur is in its most relaxed position.
Adjust the barrel adjuster on the rear derailleur or at the shifter to fine-tune the tension. You want the derailleur to move smoothly without hesitation.

Step 2: Brake Pad Alignment

To ensure optimal braking performance, the brake pads should align perfectly with the rims.

Use the barrel adjuster on the brake levers to adjust the brake tension.
Make sure the brake pads are not rubbing against the rim when the brakes are released. Adjust the pads as needed using the adjustment screws on the brake arms.

Step 3: Fine-Tune Shifting

Shift through all the gears and assess whether the derailleur moves smoothly from cog to cog. If shifting feels sluggish or skips, adjust the cable tension slightly by turning the barrel adjuster.
Check the front derailleur alignment, ensuring it doesn’t rub the chain when shifting into the large chainring.

Maintaining the Chorus 12s Ergopower Shifters

Regular maintenance of your Chorus 12s [paid link] Ergopower shifters will prolong their lifespan and ensure consistent performance.

Step 1: Cleaning the Shifters

Cleaning your shifters helps maintain smooth action and prevents dirt from affecting performance. Use a soft, dry cloth to wipe down the shifters and remove dirt and grime. Avoid using harsh chemicals that could damage the finish.

Step 2: Lubricating the Cables

Lubricating the brake and gear cables is vital to keep them from rusting and to maintain smooth shifting and braking.

Apply lubricant to the cables where they pass through the housing.
Lubricate the pivot points of the shifters to maintain smooth lever action.

Step 3: Checking the Cables and Housing

Inspect the cables regularly for any fraying or signs of wear. Replace the cables if they are showing signs of significant wear to avoid poor shifting performance. Ensure the cable housing is intact and free of any kinks or bends.

Step 4: Replace Worn-out Cables and Housing

If the cables or housing are frayed or cracked, replace them promptly. Campagnolo-specific cables and ferrules are recommended to maintain compatibility with the Chorus 12s [paid link] system.

Troubleshooting Common Issues with Chorus 12s Ergopower Shifters

Even with proper installation and maintenance, issues can sometimes arise. Below are some common problems you might encounter with the Chorus 12s [paid link] Ergopower shifters, along with solutions to resolve them.

Issue 1: Shifting is Slow or Sluggish

Cause: This can be due to incorrect cable tension or dirty cables.
Solution: Adjust the cable tension using the barrel adjuster. Clean and lubricate the cables to reduce friction.

Issue 2: Shifting Skips or Doesn’t Engage Properly

Cause: This could be caused by an improperly aligned derailleur, damaged cables, or excessive slack in the system.
Solution: Check the derailleur alignment and adjust it if necessary. Inspect the cables for any fraying or damage, and replace them if needed.

Issue 3: Brake Pads Rub Against the Rim

Cause: Misalignment of the brake pads or incorrect brake cable tension.
Solution: Realign the brake pads so they sit parallel to the rim. Adjust the brake cable tension using the barrel adjuster to ensure the pads do not rub.

Conclusion

The Campagnolo Chorus 12s Ergopower shifters are designed for cyclists who demand the best performance, durability, and precision from their components. By following this guide on installation, adjustment, and maintenance, you’ll ensure that your Chorus 12s shifters remain in top condition, delivering seamless shifting and reliable braking throughout your rides.