How to Install, Adjust, and Maintain the RED eTap AXS Crankset

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in AXS, Crankset, eTap, Red, SRAM

The SRAM RED eTap AXS Crankset [paid link] is a top-tier component designed for road cyclists who demand precision, lightweight performance, and seamless shifting. Proper installation and maintenance are critical to ensuring smooth power transfer and drivetrain longevity.

This guide provides a detailed breakdown of how to install, adjust, and maintain the RED eTap AXS Crankset [paid link], helping you avoid common mistakes and optimize your bike’s performance.

Tools Required [paid links]

  • Allen wrench
  • Torque wrench
  • Bottom bracket press (if installing a new bottom bracket)
  • Bottom bracket removal tool
  • Chainring bolt tool
  • Degreaser and clean rags
  • Lithium grease or anti-seize compound

Step-by-Step Installation Guide for RED eTap AXS Crankset

1. Prepare the Bottom Bracket and Frame

Before installing the crankset, ensure the bottom bracket (BB) is clean and free of debris. If you’re replacing an old crankset, remove the existing one using the appropriate tool. Inspect the bottom bracket shell for wear, and if necessary, install a new one following the manufacturer’s instructions.

The SRAM RED eTap AXS Crankset [paid link] is compatible with DUB [paid link] bottom brackets, so ensure you have the correct BB type for your frame (BB86, BB30, or BSA threaded).

2. Apply Grease to the Spindle

To prevent creaking and ensure smooth installation, apply a thin layer of grease to the spindle before inserting it into the bottom bracket. If your frame manufacturer recommends an anti-seize compound, use that instead.

3. Install the Drive-Side Crank Arm

  • Align the drive-side crank arm with the spindle and slide it through the bottom bracket.
  • Ensure the chainring bolts are torqued to the manufacturer’s specifications if they were removed or replaced.

4. Secure the Non-Drive Side Crank Arm

  • Attach the non-drive side crank arm to the spindle and hand-tighten the 8mm hex bolt.
  • Use a torque wrench [paid link] to tighten the bolt to 54 Nm, ensuring a secure fit.
  • Spin the crank arms a few times to check for excess friction or misalignment.

5. Verify Chainline and Clearance

Check the chainring alignment with the front derailleur to ensure smooth shifting. If the chainline appears off, verify the bottom bracket spacing and crank arm engagement.

Adjusting the RED eTap AXS Crankset for Optimal Performance

1. Setting Chainline and Q-Factor

The chainline (alignment of the chainrings with the cassette) affects shifting smoothness and drivetrain efficiency. The SRAM RED eTap AXS [paid link] Crankset comes with 46/33T or 48/35T chainrings, optimized for 12-speed drivetrains. Ensure your setup matches the correct chainline spacing (typically 45mm for road setups).

The Q-factor (crank arm spacing) is 145.5mm, ensuring efficient pedaling. Make sure your pedal cleats are adjusted for a natural knee position to avoid discomfort.

2. Checking and Adjusting Chainring Bolts

Chainring bolts can loosen over time, causing noisy shifting or chain slippage. Use a torque wrench [paid link] to check that bolts are tightened to 10-12 Nm at least once a month.

3. Ensuring Proper Front Derailleur Clearance

The RED eTap AXS front derailleur [paid link] should have a 1-3mm gap above the chainrings and be aligned parallel to them. If shifting is sluggish, adjust the front derailleur height and limit screws.

RED eTap AXS Crankset Maintenance Guide

1. Cleaning and Lubricating the Crankset

  • Wipe down the crank arms and chainrings after every ride to remove dirt and sweat.
  • Use a degreaser to clean the chainrings and apply a dry lubricant to prevent wear.

2. Inspecting for Wear and Damage

Check for signs of chainring wear, cracks, or loose bolts every 2,000 miles. Replace chainrings if the teeth appear excessively worn or shifting performance deteriorates.

3. Bottom Bracket Maintenance

  • If you hear creaks or grinding noises, remove the crankset and inspect the bottom bracket.
  • Clean and regrease the bearings, or replace the bottom bracket if wear is excessive.

4. Chain and Drivetrain Care

  • A worn chain can accelerate chainring wear. Replace the chain when it reaches 0.5% stretch using a chain checker tool.
  • If your chainrings develop shark tooth-like wear, replace them to maintain optimal shifting.

Troubleshooting Common RED eTap AXS Crankset Issues

1. Creaking or Clicking Sounds

  • Ensure the crank arm bolts are torqued correctly.
  • Clean and reapply grease to the bottom bracket interface.
  • Check for loose pedal threads and re-torque them if necessary.

2. Poor Shifting Performance

  • Ensure the chain is properly lubricated and free of dirt buildup.
  • Adjust the front derailleur alignment for a more precise shift.

FAQs

1. What torque should the RED eTap AXS crank bolt be tightened to?

The crank arm bolt should be tightened to 54 Nm using a torque wrench [paid link].

2. Can I install a different chainring size on my RED eTap AXS Crankset?

Yes, but it must be AXS-compatible. SRAM recommends 46/33T or 48/35T for road use.

3. Why does my RED eTap AXS Crankset creak?

Creaking can be caused by loose crank bolts, worn bottom bracket bearings, or dry interfaces.

4. How often should I service my bottom bracket?

Check it every 5,000 miles or if you hear creaks or feel resistance in the cranks.

5. Is the RED eTap AXS Crankset compatible with a 10-speed drivetrain?

No, it is designed exclusively for 12-speed AXS drivetrains.