Extend the Life of Your Apex XPLR Rear Derailleur with DIY Care

Posted on
in Uncategorized

The SRAM Apex XPLR [paid link] rear derailleur is a versatile and durable component, specifically designed for gravel and adventure bikes. With its robust build and smooth shifting performance, it has become a popular choice among riders who need reliable drivetrain components for mixed-terrain riding. To ensure your derailleur performs optimally over time, regular maintenance and care are crucial. This guide will provide you with detailed instructions on how to maintain, adjust, and troubleshoot the SRAM Apex XPLR rear derailleur, as well as tips for optimizing its performance and ensuring compatibility with other drivetrain components.

Tools Required

  • 5mm Allen wrench
  • 3mm Allen wrench
  • Screwdriver (flathead)
  • Torque wrench
  • Chain checker tool
  • Degreaser
  • Lubricant
  • Small brush (for cleaning)
  • T25 Torx wrench
  • Replacement derailleur hanger (if necessary)
  • 10-11-speed chain checker tool (depending on your setup)

Installation of the Apex XPLR Rear Derailleur

Installing the SRAM Apex XPLR rear derailleur is a straightforward process but requires attention to detail. Begin by securing your bike in a repair stand for better access and stability during installation.

Step 1: Remove the Existing Derailleur

If replacing an old derailleur, use a 5mm Allen wrench to remove the derailleur mounting bolt. After loosening the bolt, carefully detach the derailleur from the hanger. Ensure that the derailleur hanger is in good condition, as a bent hanger can cause shifting issues and excessive wear on the derailleur.

Step 2: Install the New Derailleur

Align the SRAM Apex XPLR rear derailleur with the derailleur hanger and use a 5mm Allen wrench to tighten the mounting bolt. Ensure the derailleur is positioned correctly, with the jockey wheels properly aligned with the cassette. Be careful not to overtighten the bolt; a torque wrench is recommended to tighten it to the specified torque setting (usually 6-8 Nm).

Step 3: Attach the Chain

Next, thread the chain through the derailleur’s jockey wheels, ensuring it runs smoothly over the cassette. Use a chain checker tool to ensure that the chain is properly sized and has no significant wear. If necessary, adjust the chain length by removing or adding links.

Step 4: Cable Routing and Tension

Route the derailleur cable through the cable stop on the frame and attach it to the derailleur’s cable anchor bolt. Use a 3mm Allen wrench to tighten the bolt. Adjust the tension of the cable by turning the barrel adjuster on the rear derailleur or the shifter. Proper cable tension is critical for smooth shifting performance, so ensure it is neither too tight nor too loose.

Step 5: Test the Shifting

Shift through the gears to test the derailleur’s performance. Fine-tune the cable tension using the barrel adjuster if needed. The shifting should be crisp and responsive, without skipping or hesitation.

Adjusting the Apex XPLR Rear Derailleur

Adjusting your rear derailleur ensures smooth, precise shifting and optimal drivetrain performance. If you notice any issues with shifting or chain noise, these adjustments may help resolve them.

Step 1: Set the High and Low Limit Screws

The Apex XPLR rear derailleur features two limit screws: one for the high gear (smallest cog) and one for the low gear (largest cog). These screws control how far the derailleur moves across the cassette. If the derailleur is overshooting the cassette or failing to shift into certain gears, adjust these screws.

  • High Limit Screw: This controls the derailleur’s movement toward the smallest cog. Turn it clockwise to limit the derailleur’s movement inward and counterclockwise to allow it to shift further.
  • Low Limit Screw: This controls the derailleur’s movement toward the largest cog. Turn it clockwise to restrict movement and counterclockwise to allow the derailleur to move further.

Step 2: Fine-Tune the Cable Tension

Proper cable tension is vital for smooth shifting. If the chain struggles to shift onto larger cogs, increase the tension by turning the barrel adjuster clockwise. If the derailleur overshoots the cogs or skips, reduce the tension by turning the barrel adjuster counterclockwise. Make small adjustments, testing the shifting after each one.

Step 3: Index the Gears

If your shifting feels sluggish or the derailleur hesitates between gears, you may need to index the gears. Shift through each gear, making sure the chain moves smoothly from cog to cog. Adjust the barrel adjuster to ensure that each shift is crisp. If necessary, make minor adjustments to the limit screws to fine-tune the derailleur’s travel.

Maintenance Tips for the Apex XPLR Rear Derailleur

Regular maintenance is essential for prolonging the life of your Apex XPLR rear derailleur. Follow these steps to keep your derailleur in top shape.

Step 1: Clean and Lubricate

Dirt and grime can accumulate on the derailleur, causing poor performance and excessive wear. Use a degreaser and a small brush to clean the derailleur, especially the jockey wheels and the spring mechanism. After cleaning, apply a light lubricant to the moving parts, ensuring they operate smoothly.

Step 2: Inspect for Damage

Regularly inspect the derailleur for any signs of wear or damage. Check the jockey wheels for cracks or excessive wear. The derailleur hanger should be straight and undamaged. If you notice any bent or broken parts, replace them immediately to avoid shifting issues.

Step 3: Tighten Bolts and Check Cable Tension

Over time, bolts can loosen, affecting the derailleur’s performance. Periodically check the tightness of the mounting bolts and the cable anchor bolt. Use a torque wrench to ensure they are properly tightened. Also, check the cable tension regularly to ensure the derailleur shifts efficiently.

Troubleshooting Common Issues with the Apex XPLR Rear Derailleur

Even the most reliable components can develop issues. Here are some common problems you may encounter with your SRAM Apex XPLR rear derailleur, and how to fix them.

1. Skipping Gears

If your bike skips gears, it could be due to poor cable tension, a bent derailleur hanger, or a worn chain. Check the derailleur hanger alignment with a derailleur hanger tool, and inspect the chain for wear using a chain checker. Adjust the cable tension if necessary.

2. Chain Drops or Jumps

A chain drop or jump can occur if the derailleur’s high or low limit screws are not set properly. Adjust the limit screws to ensure the derailleur doesn’t move too far in either direction. Check the chain for wear and replace it if necessary.

3. Sluggish Shifting

Sluggish shifting often results from poor lubrication or dirty derailleur parts. Clean and lubricate the derailleur, paying special attention to the jockey wheels and pivot points. Also, check the cable tension and adjust it for optimal shifting performance.

Customization and Optimization for Better Performance

To maximize the performance of your SRAM Apex XPLR rear derailleur, consider the following customization tips:

1. Upgrade the Jockey Wheels

Upgrading to high-quality, ceramic jockey wheels can reduce friction and improve the smoothness of your shifts. This is particularly beneficial for gravel and adventure riding, where smoother gear transitions can reduce chain wear and improve efficiency.

2. Optimize Chain Length

A properly sized chain ensures smooth shifting and reduces wear on the derailleur. If you have recently changed your gearing or installed a new cassette, adjust the chain length accordingly. A chain that is too long or too short can affect shifting performance and cause excessive wear on both the derailleur and cassette.

3. Consider a Wide-Range Cassette

The Apex XPLR rear derailleur is compatible with wide-range cassettes, making it ideal for gravel and mixed-terrain riding. Consider installing a cassette with a larger cog range if you find yourself frequently riding steep climbs. Ensure that the derailleur’s capacity matches the cassette’s largest cog for proper shifting.

Compatibility with Other Drivetrain Components

The SRAM Apex XPLR rear derailleur is designed to work seamlessly with SRAM’s 1×12 drivetrains, particularly with the Apex 1×12 shifters and the wide-range cassettes in the Eagle family. While it is not compatible with Shimano drivetrains, it pairs well with other SRAM components designed for gravel and adventure riding.

Before upgrading your drivetrain, make sure that the derailleur is compatible with your frame and cassette. Check the derailleur’s total capacity (the difference between the largest chainring and the smallest cog) and compare it to your cassette’s range to ensure smooth shifting performance.