Comparing Apex XPLR Rear Derailleurs to Other Gravel Options

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The SRAM Apex XPLR [paid link] rear derailleur is designed specifically for gravel riding, offering a robust, reliable, and versatile solution for off-road cyclists. However, when choosing the best rear derailleur for your gravel bike, it’s important to compare various options to determine which one best suits your needs. In this guide, we’ll dive deep into the features, installation, adjustment, and performance aspects of the Apex XPLR derailleur and compare it with other popular gravel-specific models.

Overview of the Apex XPLR Rear Derailleur

The SRAM Apex XPLR rear derailleur is part of the brand’s Apex groupset designed to offer superior performance on mixed terrain. It features a 1x drivetrain system, which is increasingly favored in gravel cycling due to its simplicity and ease of use. The derailleur offers a wide gearing range with a clutch system that helps maintain chain tension, minimizing the risk of chain drops on rough terrain.

The Apex XPLR derailleur is compatible with SRAM’s XPLR cassettes, specifically designed for gravel riding, offering gear ratios that support the steep inclines and variable terrain typical of gravel routes. It has been optimized for durability, precision, and ease of use under challenging conditions, ensuring a smooth, consistent ride across various gravel terrains.

Installation of the Apex XPLR Rear Derailleur

Tools Required

  • 5mm Allen wrench
  • 10mm open-end wrench
  • Torque wrench
  • Chain tool
  • Screwdrivers
  • Small adjustable wrench (optional)

Steps to Install the Apex XPLR Rear Derailleur

  1. Prepare the bike: Shift the chain to the smallest cog and remove the rear wheel for easier access to the derailleur.
  2. Remove the old derailleur: Use a 5mm Allen wrench to remove the derailleur mounting bolt. Unscrew the derailleur from the derailleur hanger.
  3. Install the new derailleur: Position the Apex XPLR derailleur on the derailleur hanger and secure it using the 5mm Allen bolt. Tighten it to the recommended torque specification.
  4. Set up the chain: With the derailleur in place, install the chain through the jockey wheels and check for proper alignment.
  5. Adjust derailleur height: Ensure that the derailleur is positioned at an optimal height relative to the cassette for smooth shifting.
  6. Cable installation: Use a 5mm Allen wrench to tighten the derailleur cable pinch bolt. Ensure that the cable tension is sufficient to allow smooth shifting.
  7. Final adjustments: Adjust the high and low limit screws on the derailleur to set the shifting range and prevent the chain from dropping off the cassette.

Adjustment of the Apex XPLR Rear Derailleur

Once installed, it’s crucial to fine-tune the Apex XPLR rear derailleur for optimal performance. Proper derailleur adjustment ensures smooth, efficient shifting, especially when navigating gravel roads.

Setting Derailleur Tension

  • Shift into the highest gear: Make sure the derailleur has adequate tension, allowing the chain to easily move to the highest cog without skipping or jumping.
  • Check the B-screw: The B-screw controls the gap between the derailleur and the cassette. Adjust it so that the derailleur maintains an optimal distance from the cassette, ensuring smooth shifts even when riding over rough terrain.

Indexing Shifting

  • Fine-tune cable tension: Use the barrel adjuster to fine-tune the cable tension. Start by shifting through the gears and listen for any hesitation or skipping. Adjust the barrel adjuster until the shifting is precise and smooth.
  • Limit screw adjustment: Make sure that the derailleur does not over-shift into the spokes or drop the chain into the frame by adjusting the high and low limit screws. These screws control the derailleur’s movement across the cassette.

Troubleshooting Common Apex XPLR Rear Derailleur Issues

Even the best rear derailleurs may face issues under heavy use. Here are some common problems and solutions when using the Apex XPLR rear derailleur.

Chain Skipping or Jumping

  • Cause: Incorrect cable tension or derailleur hanger misalignment.
  • Solution: Recheck the derailleur installation and adjust the cable tension using the barrel adjuster. If the issue persists, ensure that the derailleur hanger is not bent.

Chain Drop or Poor Chain Retention

  • Cause: Improper clutch tension or a worn-out derailleur.
  • Solution: Make sure the clutch mechanism is engaged properly and providing adequate tension. Replace the derailleur if it shows signs of wear or damage.

Shifting Hesitation

  • Cause: Poor lubrication or dirty components.
  • Solution: Clean and lubricate the derailleur, chain, and cassette regularly. Also, inspect the jockey wheels for wear.

Customization and Optimization for Better Performance

The Apex XPLR derailleur can be customized and optimized for better performance depending on your specific riding conditions and preferences.

Gear Ratios

  • Wide range cassettes: To better handle steep inclines and rough terrain, use a wide-range XPLR cassette paired with the Apex XPLR derailleur. This provides a broad gear range, ensuring smooth shifting regardless of the terrain.
  • Smaller chainring: Opting for a smaller chainring up front can help you achieve a lower gear ratio, improving your ability to climb steep gravel inclines.

Clutch Tension

  • Adjust clutch tension: If you’re riding on especially rough terrain, consider tightening the clutch mechanism to minimize chain slap and improve chain retention. On smoother surfaces, you may prefer to loosen it slightly for reduced resistance.

Comparing the Apex XPLR Rear Derailleur to Other Gravel Options

While the SRAM Apex XPLR rear derailleur is an excellent choice for gravel cyclists, there are other options available, each with its own advantages.

SRAM GX Eagle

  • Overview: The SRAM GX Eagle is another popular gravel-specific derailleur, known for its superior durability and precise shifting. It offers a wider gear range than the Apex XPLR, making it suitable for riders who tackle extreme gradients and variable gravel surfaces.
  • Comparison: The Apex XPLR is lighter and more affordable, but the GX Eagle offers a broader range and can handle more demanding conditions. However, the GX Eagle may require a 12-speed setup, which could add complexity to your bike build.

Shimano GRX RX810

  • Overview: Shimano’s GRX RX810 is a gravel-focused rear derailleur that offers a smooth, reliable ride. The RX810 comes with a clutch system that effectively manages chain retention on rough gravel roads.
  • Comparison: The Shimano GRX RX810 is generally more expensive than the Apex XPLR and offers slightly less range on the cassette. However, Shimano’s gear shifting system is known for its fluidity, which some riders may prefer.

MicroSHIFT Advent X

  • Overview: MicroSHIFT’s Advent X derailleur is a budget-friendly option for gravel cyclists who want reliable performance without the high price tag. This derailleur uses a 1×10-speed setup, providing enough gearing for most gravel terrain.
  • Comparison: The Advent X is a great value option for those on a budget, but it doesn’t offer the same smoothness or durability as the Apex XPLR. Riders who prioritize top-tier performance might find the Apex XPLR more satisfying.

Understanding Compatibility with Other Drivetrain Components

The SRAM Apex XPLR rear derailleur is designed to work seamlessly with SRAM’s 1x XPLR cassettes and chains, making it an ideal choice for gravel riders using the SRAM system. It’s important to understand the compatibility with other components when building or upgrading your gravel bike.

Compatibility with Shifters

The Apex XPLR derailleur is optimized for use with SRAM’s 1x gravel shifters. Ensure that the shifter matches the drivetrain setup (e.g., 11-speed or 12-speed) to ensure smooth and efficient shifting.

Chain and Cassette Compatibility

  • Cassette: The Apex XPLR rear derailleur is compatible with SRAM XPLR cassettes, which are specifically designed to handle gravel terrain. Ensure that the cassette is within the recommended range for optimal performance.
  • Chain: A compatible chain should be used with the Apex XPLR derailleur. It is advisable to use SRAM’s recommended 12-speed chain for the best performance, ensuring that the derailleur moves across the gears smoothly.

Conclusion

The SRAM Apex XPLR rear derailleur offers exceptional performance for gravel cycling, combining durability, reliability, and ease of use. It is a standout choice for riders who want a versatile and efficient derailleur system for mixed-terrain rides. By understanding its installation, adjustment, and optimization processes, you can ensure that your Apex XPLR derailleur is performing at its best. Comparing it to other gravel derailleur models like the SRAM GX Eagle or Shimano GRX RX810 helps cyclists make informed decisions based on their riding preferences and budget. Whether you’re climbing steep gravel hills or navigating rocky paths, the Apex XPLR derailleur is a dependable choice for any gravel enthusiast.