Is the Force XPLR eTap AXS the Best Rear Derailleur for Gravel Bikes?

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The SRAM Force XPLR eTap AXS [paid link] rear derailleur is designed with the gravel cyclist in mind, offering a blend of performance, reliability, and advanced technology. As the popularity of gravel bikes continues to rise, many riders are exploring ways to optimize their gear setups for off-road adventures. In this guide, we will cover everything you need to know about the Force XPLR eTap AXS rear derailleur, from installation to performance enhancements and troubleshooting.

Installation of the SRAM Force XPLR eTap AXS Rear Derailleur

Installing the SRAM Force XPLR eTap AXS rear derailleur is a straightforward process, but attention to detail is required to ensure optimal performance. Follow the steps below to properly install this component on your gravel bike:

Tools Required:

  • 5mm Allen wrench
  • 2.5mm Allen wrench
  • Torque wrench
  • Chain tool (for chain installation)
  • Cable cutter (if adjusting the length of the cable)
  • Flathead screwdriver (for fine-tuning adjustments)

Steps for Installation:

  1. Remove the Old Derailleur (If Applicable):
    • Use a 5mm Allen wrench to remove the fasteners holding the old derailleur in place.
    • Carefully remove the chain from the derailleur and any tensioning device.
  2. Install the New Derailleur Hanger:
    • Attach the derailleur hanger to the frame using the appropriate fasteners.
    • Ensure the hanger is straight and correctly aligned with the frame for smooth shifting.
  3. Attach the Rear Derailleur:
    • Slide the derailleur onto the derailleur hanger, securing it with the provided fasteners.
    • Tighten the bolts using a 5mm Allen wrench to the manufacturer’s recommended torque settings (usually around 5–6 Nm).
  4. Install the Chain:
    • Using a chain tool, install the chain according to your bike’s specifications.
    • Make sure the chain is properly threaded through the derailleur and rear cassette.
  5. Connect the AXS Battery:
    • Attach the AXS battery to the derailleur using the provided mounting system.
    • Ensure that the battery is securely in place and that the connection is clean.
  6. Fine-Tuning Adjustments:
    • Use a 2.5mm Allen wrench to adjust the limit screws for the front and rear derailleurs.
    • Check for smooth shifting through all the gears.

Final Check:

  • Test the shifting performance and ensure the derailleur moves freely and accurately through all gears.
  • Verify chain tension and that there is no rubbing or skipping.

Adjusting the SRAM Force XPLR eTap AXS Rear Derailleur

Once the Force XPLR eTap AXS rear derailleur is installed, fine-tuning the adjustments ensures smooth and reliable shifting, especially when riding on rough terrain. The derailleur is equipped with SRAM’s eTap AXS system, which allows for wireless electronic shifting.

Adjusting the Limit Screws:

  1. Low and High Limit Screws:
    • The derailleur’s high and low limit screws control the movement range of the derailleur.
    • Start by adjusting the low limit screw to ensure the derailleur can shift properly into the smallest cog.
    • Next, adjust the high limit screw to ensure the derailleur can shift into the largest cog without overshooting.
  2. B-Tension Adjustment:
    • The B-tension screw adjusts the angle of the derailleur and the distance between the derailleur and the cassette.
    • This ensures optimal shifting and minimizes any risk of chain rubbing.
  3. Indexing the Gears:
    • Fine-tune the indexing by shifting through the gears. Use the eTap AXS shifter to test each gear’s engagement.
    • Adjust the derailleur position to ensure smooth transitions, especially in high-speed and under-load conditions.
  4. Battery Check and Calibration:
    • Make sure the AXS battery is fully charged and connected to the derailleur.
    • Perform a calibration through the eTap AXS app to verify the shifting positions are accurate and consistent.

Maintaining the SRAM Force XPLR eTap AXS Rear Derailleur

Proper maintenance of the SRAM Force XPLR eTap AXS rear derailleur will extend its lifespan and ensure optimal performance over time. Since the Force XPLR is designed for gravel bikes, it is built to withstand harsh conditions, but periodic maintenance is essential.

Regular Maintenance Tasks:

  1. Clean the Derailleur:
    • After each ride, clean the derailleur to remove any dirt, dust, or mud that may have accumulated.
    • Use a soft cloth and mild detergent to wipe down the derailleur, taking care not to disturb the eTap AXS components.
  2. Lubricate the Chain:
    • Apply lubricant to the chain regularly, especially after riding in wet or muddy conditions. This prevents rust and ensures smooth shifting.
  3. Check the Battery:
    • Inspect the AXS battery for any signs of wear or low charge.
    • Periodically check the battery connection to ensure it is secure and free of debris.
  4. Inspect the Derailleur for Damage:
    • Regularly inspect the derailleur for any physical damage, such as cracks or bent components. If any parts are damaged, replace them immediately.

Annual Maintenance:

  • Perform a full derailleur inspection annually to check for wear on the jockey wheels, derailleur hanger alignment, and the condition of the shifting cables (if applicable).
  • Replace any worn-out parts, including the jockey wheels, and reapply lubrication to maintain smooth operation.

Troubleshooting Common Issues with the SRAM Force XPLR eTap AXS Rear Derailleur

Even with a high-performance derailleur like the SRAM Force XPLR eTap AXS, cyclists may encounter common issues that need attention. Here are some common problems and their solutions:

1. Shifting Is Not Smooth

  • Cause: This can be due to improper indexing or a misaligned derailleur.
  • Solution: Check the derailleur for any misalignment and adjust the limit screws. Recheck the indexing and ensure the AXS system is properly calibrated.

2. Chain Drops or Skips Gears

  • Cause: The derailleur’s B-tension might be too tight or too loose.
  • Solution: Adjust the B-tension screw to ensure the derailleur is positioned optimally for smooth shifting and chain engagement.

3. Battery Drain

  • Cause: An incorrectly installed or malfunctioning battery can lead to rapid power loss.
  • Solution: Verify the battery is installed correctly and fully charged. If the battery drains too quickly, consider replacing it or contacting SRAM support.

Customizing the SRAM Force XPLR eTap AXS for Better Performance

Customization options for the Force XPLR eTap AXS rear derailleur help fine-tune performance for specific gravel riding needs. Whether you’re tackling steep climbs or fast descents, small adjustments can enhance your riding experience.

1. Gear Ratios:

  • Consider adjusting the cassette or chainring sizes for the type of gravel riding you prefer. Larger cassettes offer a wider gear range for tackling steep terrain, while smaller ones are ideal for faster, smoother surfaces.

2. Jockey Wheels:

  • Custom jockey wheels with different tooth profiles or materials can reduce friction and increase shifting efficiency, especially in muddy or dusty conditions.

3. eTap AXS Customization:

  • Utilize the eTap AXS app to customize shifting preferences, such as shift patterns or button configuration, to tailor the system to your riding style.

Comparing the SRAM Force XPLR eTap AXS with Other Gravel Derailleurs

When choosing the best rear derailleur for your gravel bike, it’s important to compare models. The SRAM Force XPLR eTap AXS is specifically designed for gravel use, but how does it compare to other similar models?

SRAM Rival eTap AXS:

  • The Rival eTap AXS is a more affordable option, but it lacks the same level of refinement and durability found in the Force model. It is suitable for casual gravel riders but may not offer the same level of performance on demanding terrains.

Shimano GRX Di2:

  • The Shimano GRX Di2 system is another competitor in the gravel market, offering precise electronic shifting. While it is slightly heavier than the Force XPLR, it provides exceptional reliability and is favored by many gravel riders who value durability and ease of use.

Campagnolo Ekar:

  • The Campagnolo Ekar system offers a 13-speed gear range, which some riders prefer for its simplicity and precision. However, it is less compatible with other drivetrain components compared to the SRAM Force XPLR.

Compatibility with Other Drivetrain Components

The SRAM Force XPLR eTap AXS is designed to be compatible with other SRAM AXS components. Its 12-speed drivetrain system pairs well with other eTap AXS components like the SRAM AXS shifters and hydraulic disc brakes. However, it is important to note that the system may not be compatible with certain non-SRAM components due to the unique AXS wireless communication protocol.

If you plan to mix and match components from different brands, consult compatibility guides and make sure the components work together seamlessly to avoid shifting issues or mechanical failures.