How to Install Your Apex 1 (11-speed) Rear Derailleur at Home

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Installing the SRAM Apex 1 (11-speed) rear derailleur is an essential skill for any road bike enthusiast looking to improve their drivetrain setup. This guide will walk you through the entire process, from preparation to the final adjustment, ensuring a smooth installation with optimal performance. Whether you’re upgrading your bike or replacing a worn-out component, the steps outlined here will help you do so with precision.

Tools Required

To install the Apex 1 rear derailleur, you’ll need the following tools:

  • 5mm Allen wrench
  • 3mm Allen wrench
  • Torque wrench (for precise tightening)
  • Chain tool (if removing or adjusting the chain)
  • Cable cutters
  • Screwdriver (if needed for minor adjustments)
  • Chain checker (for wear)
  • Lubricant (optional, for smooth cable movement)

Preparing for the Installation

Before beginning the installation, ensure that your bike is clean and properly positioned on a work stand. This will give you ample space to work on the rear derailleur and ensure precise adjustments. Make sure to have your tools organized and accessible.

Step-by-Step Guide to Installing the Apex 1 Rear Derailleur

1. Remove the Old Derailleur (if applicable)

If you’re replacing an existing rear derailleur, you’ll need to first remove it. Begin by shifting your bike into the smallest cog to relieve tension on the derailleur. Using a 5mm Allen wrench, remove the mounting bolt that attaches the derailleur to the derailleur hanger. Once the bolt is removed, take off the derailleur and set it aside.

2. Install the New Apex 1 Derailleur

Take your new SRAM Apex 1 (11-speed) rear derailleur and align it with the derailleur hanger. The hanger is the small part that extends from your bike frame, and it’s essential to ensure the derailleur is installed straight to prevent shifting issues.

  • Slide the derailleur onto the hanger.
  • Tighten the mounting bolt using a 5mm Allen wrench. Be sure not to overtighten the bolt—use a torque wrench to ensure you’re within the manufacturer’s recommended specifications (typically around 7-10 Nm).
  • Double-check the derailleur alignment. The jockey wheels (the small wheels on the derailleur) should sit parallel to the cassette.

3. Attach the Derailleur to the Chain

The SRAM Apex 1 features a single-chainring setup, so there are no front derailleur cables to worry about. The rear derailleur is connected to the chain by the jockey wheels. Make sure your chain is properly threaded through the derailleur, aligning it with the jockey wheels.

4. Install the Chain (if removed)

If you’ve removed the chain for installation or maintenance, install it back on the bike. Ensure the chain is correctly threaded through the rear derailleur and around the cassette.

If your chain requires adjustment for length, use a chain tool to remove the necessary links. Ensure the chain is properly tensioned, with no slack or excess.

5. Install and Adjust the Shifting Cable

Now it’s time to install the shifting cable. Start by inserting the cable into the derailleur’s cable barrel, located on the derailleur body. Thread the cable through the frame and ensure it is routed correctly.

  • Tighten the barrel adjuster to secure the cable.
  • Use a 3mm Allen wrench to tighten the bolt that holds the cable in place on the derailleur.
  • Ensure there is no slack in the cable and that it is taut but not overly tight.

6. Set Up the B-Screw

The B-screw on the rear derailleur controls the distance between the derailleur’s jockey wheels and the cassette. To optimize shifting performance, adjust the B-screw so that the jockey wheels are about 5-6mm from the largest cog on the cassette when the derailleur is in the highest gear.

To adjust the B-screw:

  • Turn the screw clockwise to move the derailleur closer to the cassette.
  • Turn the screw counterclockwise to move the derailleur further away.

Shifting Adjustments

After installing the derailleur and cable, you may need to fine-tune the shifting. Shift through the gears and observe the shifting performance. If the derailleur hesitates or skips gears, adjust the barrel adjuster on the rear derailleur or the shifter to achieve smooth transitions between gears.

1. Limit Screw Adjustments

The limit screws on the derailleur control the movement of the derailleur within the cassette. Incorrect settings can cause the chain to overshoot or miss gears. Adjust the screws as follows:

  • High limit screw: Prevents the derailleur from shifting beyond the smallest cog.
  • Low limit screw: Stops the derailleur from shifting beyond the largest cog.

Use the 3mm Allen wrench to adjust the screws. Shift to the smallest cog (high gear) and make sure the derailleur does not overshoot. Then, shift to the largest cog and ensure it stays within the gear without overextending.

2. Test the Shifting

After making adjustments, perform a test ride. Shift through all the gears, paying special attention to any skipping, hesitation, or noise. Fine-tune the barrel adjuster and limit screws as necessary to achieve crisp, reliable shifting.

Troubleshooting Common Issues

1. Poor Shifting Performance

If your shifting is not smooth, it could be due to incorrect cable tension or derailleur alignment. Double-check the derailleur hanger for straightness and ensure the cable is routed correctly. A loose cable can cause poor shifting, so recheck the tension and tighten the cable if needed.

2. Chain Slapping or Noise

Chain slapping occurs when the derailleur moves too far, especially in the larger gears. Adjust the B-screw to ensure the derailleur is not too far from the cassette. Additionally, check the chain for wear, as a stretched chain can also cause shifting problems.

Customization and Optimization for Better Performance

To optimize your SRAM Apex 1 rear derailleur setup, consider the following:

  • Chainring Choice: The Apex 1 system uses a 1×11 setup, making it perfect for road riders who prioritize simplicity and reliability. Ensure you select the appropriate chainring size for your riding style.
  • Cassette Compatibility: The Apex 1 rear derailleur is compatible with cassettes ranging from 11-32t to 11-42t, providing flexibility depending on your terrain and riding preference. Larger cassettes will provide more range for climbing, while smaller ones are ideal for flat terrain and speed.
  • Lubrication: Regularly lubricate the chain and derailleur pivots to reduce friction and improve shifting performance. Proper lubrication will extend the life of your components and keep your bike running smoothly.

Comparison with Other 1x Drivetrains

When compared to other 1×11 drivetrains, the SRAM Apex 1 stands out for its affordability, ease of use, and durability. Its simplicity is ideal for riders who want to eliminate the front derailleur and simplify shifting. While it may not offer the same high-end performance as SRAM’s Red or Force groupsets, the Apex 1 offers excellent value for riders on a budget or those looking for a robust and low-maintenance setup.

Conclusion

Installing the SRAM Apex 1 (11-speed) rear derailleur at home is a straightforward process when you follow these detailed steps. From removing the old derailleur to setting the proper shifting adjustments, each phase of installation is crucial for ensuring optimal performance. Regular maintenance and minor adjustments will help keep your bike’s drivetrain in peak condition, allowing you to focus on your ride.