The SRAM Force XPLR eTap AXS [paid link] is a high-performance electronic rear derailleur designed specifically for gravel and adventure bikes. Offering precise shifting and seamless integration with SRAM’s AXS system, this derailleur is built to withstand the challenges of gravel riding. Whether you’re dealing with shifting issues or want to fine-tune your system for optimal performance, this guide will walk you through the necessary steps to properly adjust the rear derailleur.
Tools Required
- SRAM AXS app (for wireless tuning)
- 5mm Allen wrench
- T25 Torx wrench
- Phillips head screwdriver
- Torque wrench (recommended for precise adjustments)
- Cleaning supplies (e.g., degreaser, rags)
- Bicycle stand (optional but recommended)
Installation of the SRAM Force XPLR eTap AXS Rear Derailleur
Before starting the adjustment process, ensure that your Force XPLR eTap AXS rear derailleur is correctly installed on your bike. The installation process for this component is straightforward, but it’s essential to follow the steps accurately to ensure the derailleur works as intended.
- Attach the derailleur to the hanger: Use the T25 Torx wrench to secure the derailleur onto the derailleur hanger. Be sure that the derailleur hanger is aligned and that the derailleur is sitting at a natural angle.
- Install the chain: Feed the chain through the jockey wheels of the derailleur, ensuring that the chain runs smoothly along the derailleur path. Make sure the chain is routed correctly for the front and rear sprockets.
- Mount the battery: The SRAM Force XPLR eTap AXS uses a removable battery. Install the battery into the derailleur’s battery compartment and secure it in place. Make sure that it’s charged and connected correctly.
- Connect to the AXS system: Once the derailleur and battery are in place, use the SRAM AXS app to pair the derailleur with your AXS system, ensuring that it communicates wirelessly with the rest of your drivetrain components.
Adjusting the SRAM Force XPLR eTap AXS Rear Derailleur
Now that the installation is complete, it’s time to adjust the rear derailleur to ensure smooth and precise shifting performance. Follow these steps for optimal adjustment.
1. Calibrate the derailleur using the AXS app
The Force XPLR eTap AXS derailleur can be calibrated using the SRAM AXS app. This wireless adjustment tool is essential for achieving the best shifting performance, as it allows for automatic trimming of the derailleur position.
- Open the SRAM AXS app and select your Force XPLR eTap AXS derailleur.
- Navigate to the “Derailleur Adjustment” section and select “Calibrate.”
- The app will guide you through the calibration process, which involves checking the derailleur’s position and adjusting its range to ensure it shifts smoothly across the cassette.
2. Set the B-tension screw
The B-tension screw controls the derailleur’s distance from the cassette. This adjustment is crucial for proper chain movement and smooth shifting. To adjust the B-tension screw:
- Shift your bike to the smallest rear cog.
- Using a 5mm Allen wrench, turn the B-tension screw counterclockwise to increase the gap between the derailleur and the cassette or clockwise to decrease the gap. The goal is to have the jockey wheels aligned with the cassette in the small cog position without rubbing.
3. Adjust the limit screws
Limit screws prevent the derailleur from shifting the chain beyond the range of the cassette. These screws are crucial for avoiding derailleur overextension, which could cause damage or misalignment.
- High limit screw (H-screw): Shift to the largest rear cog and ensure that the derailleur is positioned directly in line with it. If the derailleur moves beyond the cog, use a T25 Torx wrench to adjust the high limit screw.
- Low limit screw (L-screw): Shift to the smallest rear cog and check that the derailleur doesn’t overshoot the cog. Adjust the low limit screw if necessary to ensure the derailleur stays within its intended range.
4. Test the shifting performance
After calibrating and adjusting the derailleur, it’s important to test the shifting performance across all gears to ensure smooth and consistent transitions. Shift through the entire cassette, checking for any hesitation, skipping, or noise.
If the shifting feels sluggish or inconsistent, recheck the B-tension and limit screws, and ensure that the derailleur is properly aligned with the cassette.
Troubleshooting Common Set-Up Issues
Even with precise adjustments, there may still be occasional shifting issues. Here are some common problems and solutions:
1. Skipping gears or poor shifting performance
- Cause: This may be due to improper B-tension settings, a misaligned derailleur hanger, or a dirty drivetrain.
- Solution: Recheck the B-tension screw for the correct gap, inspect the derailleur hanger for alignment, and clean your chain and cassette to remove any grime or buildup.
2. Derailleur failing to shift to the smallest or largest cog
- Cause: This is often caused by improperly adjusted limit screws or a stretched chain.
- Solution: Revisit the limit screw adjustments and inspect the chain for wear. If the chain is stretched, consider replacing it for optimal performance.
3. Chain rubbing or skipping in specific gears
- Cause: This could indicate a misalignment in the derailleur’s setup or an issue with the AXS system’s pairing.
- Solution: Double-check the derailleur’s position using the AXS app, ensuring it’s correctly calibrated. Re-adjust the limit screws as necessary.
Customization and Optimization for Better Performance
To further optimize the performance of the SRAM Force XPLR eTap AXS rear derailleur, consider the following adjustments:
1. Changing the chainring size
Switching to a larger or smaller chainring can affect the overall gearing ratio and the derailleur’s performance. For gravel bikes, riders often choose a 40T or 42T chainring, but adjusting the chainring size may require adjustments to the front derailleur, bottom bracket, and crankset.
2. Upgrading the cassette
If you need a wider range of gears for steep climbs or faster descents, consider upgrading your cassette to one with a larger cog range, such as a 10-36T or 10-42T. When changing your cassette, ensure that the derailleur’s capacity can accommodate the new range.
3. Fine-tuning via the AXS app
The AXS app allows for wireless fine-tuning of the derailleur’s trim settings, which can be particularly useful for gravel riders who frequently switch between different gear combinations. Experiment with subtle adjustments to the derailleur’s trim settings for smoother transitions between gears, especially when riding on rough terrain.
Comparison with Similar Models
While the Force XPLR eTap AXS is a specialized rear derailleur designed for gravel riding, it’s important to compare it with other options in the SRAM lineup to ensure you’re making the right choice for your bike. The SRAM Red eTap AXS and SRAM Rival eTap AXS are also wireless electronic derailleurs, but they differ in terms of weight, performance, and price. The Force XPLR eTap AXS is specifically designed to handle the unique demands of gravel and adventure cycling, offering a slightly more robust build and enhanced durability compared to the more road-focused Red and Rival models.
Understanding Compatibility with Other Drivetrain Components
The SRAM Force XPLR eTap AXS rear derailleur is part of the SRAM AXS ecosystem, which is designed for seamless integration across different AXS components. However, it’s essential to check compatibility with your specific bike setup, including:
- Shifters: The Force XPLR eTap AXS rear derailleur is fully compatible with SRAM’s eTap AXS shifters, whether they are part of the Force, Rival, or Red series.
- Cassette and Chain: Ensure that your cassette and chain are within the derailleur’s capacity. The Force XPLR eTap AXS is compatible with SRAM’s 10-33T, 10-36T, and 10-42T cassettes.
- Bottom Bracket and Crankset: For proper shifting performance, ensure that your bike’s bottom bracket and crankset are compatible with your chosen chainring size.
By understanding and properly adjusting the SRAM Force XPLR eTap AXS rear derailleur, you can ensure that your gravel bike delivers the best possible shifting performance for all your off-road adventures.