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

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Replacing or servicing the bearings in your SRAM RED eTap AXS crankset [paid link] is an essential maintenance task that ensures the longevity and smooth performance of your bike’s drivetrain. Properly functioning bearings reduce friction and play a crucial role in the overall power transfer, so knowing how to replace or service them can keep your ride feeling efficient and quiet. This guide will walk you through the steps necessary to service or replace the bearings in your SRAM RED eTap AXS crankset [paid link].

Tools Required

  • Torque wrench [paid link] (with appropriate torque range)
  • 8mm Allen wrench [paid link]
  • 5mm Allen wrench [paid link]
  • Bearing press [paid link] tool (if replacing bearings)
  • Clean cloth or rag
  • Degreaser
  • Grease (preferably bike-specific grease)
  • Crankset puller tool
  • Hammer (if necessary, for press-fit tools)
  • Replacement bearings (for service or replacement)

Understanding the Importance of Bearings in Your Crankset

Bearings play a critical role in allowing the crankset to rotate smoothly with minimal friction. Over time, they can wear out due to dirt, moisture, and the constant stress from pedaling. In the SRAM RED eTap AXS crankset [paid link], the bearings are typically found in the bottom bracket and within the crankset itself. A well-maintained bearing system improves overall ride efficiency, ensures smooth power transfer, and reduces the risk of premature wear on other drivetrain components.

If you’re noticing any issues with your crankset, such as resistance when pedaling, creaking sounds, or wobbling, it might be due to the bearings needing attention.

Step-by-Step Guide to Replacing or Servicing the Bearings

1. Remove the Crankset

The first step in replacing or servicing the bearings is to remove the crankset from the bike. To do this:

  • Use a 5mm Allen wrench [paid link] to remove the bolts securing the left and right crank arms to the spindle.
  • Carefully remove the crank arms from the bike. You may need a crank arm puller tool to ensure proper removal without damaging the arms or spindle.

2. Inspect the Bearings

Once the crankset is removed, inspect the bearings for signs of wear or damage. Look for:

  • Roughness when spinning the bearings by hand.
  • Visible pitting or corrosion.
  • Any looseness or play within the bearing housing.

If the bearings are damaged or excessively worn, they will need to be replaced. If they appear dirty but not damaged, cleaning and re-greasing may suffice.

3. Clean the Bearing Housings

Before proceeding with bearing replacement or service, thoroughly clean the bearing housings. Use a clean cloth and degreaser to remove any dirt, grime, or old grease. This will provide a clean surface for the new bearings and ensure smooth operation.

4. Press Out the Old Bearings (If Replacing)

If you need to replace the bearings, you must press out the old ones from the crankset. Here’s how to do it:

  • Place the crankset on a stable surface.
  • Use a bearing press [paid link] tool designed for your specific crankset model to carefully press out the old bearings. Apply even pressure to avoid damaging the crankset.
  • If necessary, gently tap with a hammer to loosen the bearings, but avoid over-striking to protect the crankset material.

5. Install the New Bearings

Once the old bearings are removed, it’s time to install the new ones. Before installation:

  • Clean the bearing cups in the crankset again to ensure proper seating for the new bearings.
  • Lightly grease the bearing housing and the new bearings to reduce friction and improve lifespan.

To install the new bearings:

  • Use the bearing press [paid link] tool to press the new bearings into place. Be sure to press evenly and with moderate force to ensure they seat properly.
  • Check that the bearings are fully seated in their housings. A gentle push or tap with a soft mallet can be used, but be cautious not to damage the bearings or crankset.

6. Reassemble the Crankset

After installing the new bearings, it’s time to reassemble your crankset.

  • Carefully reinstall the left and right crank arms onto the spindle. Ensure they are oriented correctly for the desired chainring positioning.
  • Tighten the crank arm bolts to the manufacturer’s recommended torque specification, typically between 30-40Nm for SRAM components.

Check that the crankset rotates freely without excessive resistance or wobble.

7. Test for Smooth Rotation

Before you finish, check the performance of your crankset. Spin the crank arms by hand and observe the smoothness of rotation. There should be no grinding, roughness, or wobbling. If everything feels good, you can reassemble the rest of the bike and test it on the road.

8. Apply Proper Maintenance Going Forward

To prevent premature wear on your newly installed bearings, follow a regular maintenance routine:

  • Clean your crankset and drivetrain frequently, especially after riding in wet or muddy conditions.
  • Re-grease your bearings during regular bike tune-ups to ensure optimal performance.
  • Check the tightness of your crank arm bolts regularly, as loose bolts can lead to bearing wear.

Troubleshooting Common Bearing Issues

If you’re experiencing issues after replacing or servicing the bearings, here are a few common problems and their solutions:

  • Creaking Noises: This may be due to improperly installed bearings or the crank arms not being torqued correctly. Double-check the crank arm bolts and re-torque them.
  • Crankset Wobble: If the crankset feels unstable after installation, it could indicate a loose bottom bracket or improperly installed bearings. Check the bottom bracket and crankset interface.
  • Rough Pedaling Feel: This may result from insufficient lubrication or damaged bearings. If cleaning and re-greasing do not fix the problem, consider replacing the bearings.

Conclusion

Replacing or servicing the bearings in your SRAM RED eTap AXS [paid link] crankset is a crucial maintenance task that can prolong the lifespan of your bike and improve its overall performance. By following the outlined steps, you can ensure your crankset operates smoothly, maintains optimal power transfer, and reduces wear on other drivetrain components. Regular maintenance, including bearing inspections and servicing, will keep your bike in top shape and provide you with an efficient and smooth ride for years to come.