How to Replace or Service the Bearings in Your Force eTap AXS Crankset

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The Force eTap AXS Crankset [paid link] from SRAM is a high-performance piece of cycling technology, engineered for smooth shifting and efficient power transfer. Like any mechanical component, over time the bearings within the crankset may require attention. Regular maintenance or replacement of these bearings ensures your crankset continues to perform at its peak, providing optimal efficiency and power delivery during your rides.

In this guide, we will walk through the process of replacing or servicing the bearings in your Force eTap AXS Crankset [paid link]. Properly maintaining these bearings can extend the life of your crankset and enhance your riding experience.

Tools Required

  • Torque wrench [paid link]
  • 8mm Allen key
  • 10mm Allen key
  • Crankset tool (if needed)
  • Bearing press [paid link] (or bearing extractor tool)
  • Grease (preferably a high-quality, water-resistant grease)
  • Clean rags or paper towels
  • Isopropyl alcohol or degreaser

Preparation

Before starting, ensure you have all the necessary tools. It’s important to work in a clean, well-lit environment to avoid any dust or debris contaminating the components during the service. Make sure your bike is securely positioned on a workstand or stable surface to prevent any accidents.

Step 1: Remove the Crankset

To access the bearings, you first need to remove the crankset from the bike.

  1. Use the 8mm Allen key to remove the crank arm bolts that secure the crankset to the bike.
  2. Use a crankset removal tool, if necessary, to detach the crankset from the bike. Be sure to follow the specific steps for your bike’s bottom bracket configuration.

Step 2: Clean the Crankset

Before you remove the bearings, clean the crankset components thoroughly using isopropyl alcohol or a degreaser. This helps ensure that no dirt or grime contaminates the new bearings during installation. Wipe down the crank arms and bottom bracket area with a clean rag, and make sure everything is dry before proceeding.

Step 3: Remove the Bearings

The Force eTap AXS Crankset [paid link] typically uses sealed bearings in the bottom bracket and crankset assembly. These can become worn out over time, affecting the smoothness and efficiency of your ride. To replace or service them, follow these steps:

  1. Inspect the bearings carefully. If they are visibly damaged, they will need to be replaced. If you simply need to service them, cleaning and re-greasing might suffice.
  2. Use a bearing extractor tool or press to carefully remove the bearings from their housing. It’s crucial to do this gently to avoid damaging the crankset or the bottom bracket.
  3. Once removed, inspect the condition of the bearing cups. If they show signs of wear or corrosion, they should also be replaced.

Step 4: Clean and Lubricate the Bearing Area

Once the bearings are removed, clean the area where they were seated. Apply a small amount of grease to the bearing cups and the surrounding areas. This will help create a smooth, secure fit for the new bearings and prevent them from seizing due to moisture or friction.

If you’re re-greasing the current bearings, clean them thoroughly using a degreaser. Then, apply a thin layer of grease to the bearings themselves, ensuring they are well-lubricated but not over-saturated.

Step 5: Install the New Bearings

  1. Take the new bearings and carefully press them into the bearing cups. A bearing press [paid link] is the best tool for this, as it allows you to install the bearings evenly without damaging them.
  2. Ensure that the bearings are seated fully and securely, with no gaps between them and the bearing cups. This step is critical to ensure smooth rotation and proper performance of your crankset.
  3. Double-check the installation to confirm that the bearings are aligned correctly.

Step 6: Reassemble the Crankset

  1. Once the new bearings are installed, it’s time to reassemble your crankset.
  2. Apply some grease to the crank arm bolts to prevent seizing and ensure smooth removal in the future.
  3. Reattach the crankset to the bike using the 8mm Allen key, tightening the bolts to the manufacturer’s recommended torque specifications (usually around 40-50 Nm).
  4. Recheck the crankset for any unusual play or tightness. Everything should feel smooth and secure.

Step 7: Test Ride and Final Adjustments

After the crankset is reinstalled, it’s important to test the bike to ensure everything is functioning correctly. Perform a test ride and pay attention to any noises or unusual resistance. If you notice any grinding, wobbling, or stiffness in the pedal stroke, it could indicate that the bearings were not installed correctly or that further adjustments are needed.

If everything feels smooth and quiet, your job is done. If any issues persist, consider rechecking the bearing installation or consult a professional mechanic.

Conclusion

Regular maintenance and bearing replacement are crucial steps in preserving the performance and longevity of your SRAM Force eTap AXS Crankset. By following the steps outlined above, you can keep your crankset running smoothly and efficiently, ensuring you get the best performance out of your ride. Whether you’re replacing worn-out bearings or servicing existing ones, a well-maintained crankset contributes to an improved cycling experience and greater power transfer.