How to Install, Adjust, and Maintain the SM-BB9000

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The Shimano SM-BB9000 [paid link] is a high-performance Hollowtech II bottom bracket designed for smooth power transfer and durability. It is a key component in the Dura-Ace 9000 series and is optimized for 24mm crank spindles. Proper installation and maintenance ensure efficiency and longevity, while incorrect setup can lead to premature wear, creaking, and power loss.

In this guide, we’ll cover everything you need to know about installing, adjusting, and maintaining the SM-BB9000 [paid link], ensuring that your drivetrain runs smoothly with minimal resistance.

Tools Required

To install and maintain your SM-BB9000 [paid link] bottom bracket, you’ll need:

  • Bottom bracket wrench (Shimano TL-FC24 or TL-FC25)
  • Torque wrench [paid link] (with Nm settings)
  • 5mm and 10mm Allen keys [paid link]
  • Bottom bracket press tool (for press-fit models)
  • High-quality grease or anti-seize compound
  • Thread locker (if required by frame manufacturer)
  • Degreaser and clean rags

Step-by-Step Installation of the SM-BB9000

1. Preparing the Bottom Bracket Shell

Before installing the SM-BB9000, ensure the bottom bracket shell is clean and properly faced.

  • Remove old components: If replacing an existing bottom bracket, clean any residue or old grease.
  • Inspect the shell: Check for burrs or damage that could affect alignment.
  • Grease the threads: Apply a thin layer of grease or anti-seize to prevent seizing and creaking.

2. Installing the SM-BB9000

For BSA (Threaded) Frames:

  1. Screw in the bottom bracket cups:
    • The right-side cup (drive side) tightens counterclockwise.
    • The left-side cup (non-drive side) tightens clockwise.
  2. Tighten to the correct torque: Shimano recommends 35-50 Nm.
  3. Check alignment: Ensure the cups are fully seated and even.

For Press-Fit Frames (BB92, BB86, etc.):

  1. Use a bottom bracket press tool to press each cup into the frame slowly.
  2. Ensure alignment to prevent bearing misalignment.
  3. Avoid excessive force, which can damage the frame or bearings.

3. Installing the Crankset

Once the bottom bracket is installed:

  1. Slide the spindle through the bearings, ensuring a snug fit.
  2. Install the left crank arm and torque the bolts to 12-14 Nm.
  3. Tighten the preload cap with a Shimano TL-FC16 [paid link] tool.
  4. Check for play: The cranks should spin smoothly without lateral movement.

Adjusting the SM-BB9000 for Optimal Performance

Checking for Proper Bearing Preload

  • If the crankset feels too tight, loosen the preload cap slightly.
  • If there is lateral movement, tighten the cap until snug, then secure the pinch bolts.

Eliminating Bottom Bracket Creaks

  • Ensure the shell is properly greased and faced.
  • Use carbon assembly paste for carbon frames to reduce movement.
  • If the noise persists, consider applying Teflon tape to the threads.

Maintenance Guide: Keeping the SM-BB9000 Running Smoothly

Routine Cleaning and Lubrication

  1. Clean the exterior regularly to prevent dirt buildup.
  2. Re-grease the threads every 3,000–5,000 km to prevent creaking.
  3. Check bearings: Spin the crank to detect roughness or resistance.

When to Replace the SM-BB9000 Bearings

  • If you hear grinding or feel resistance, it may be time to replace the bearings.
  • Shimano recommends checking for bearing wear every 10,000 km.

Troubleshooting Common SM-BB9000 Issues

1. Creaking Noises During Pedaling

  • Cause: Improper installation, lack of grease, or worn bearings.
  • Solution: Disassemble, clean, reapply grease, and reinstall correctly.

2. Loose or Wobbly Crankset

  • Cause: Insufficient preload or worn bottom bracket bearings.
  • Solution: Tighten the preload cap and check bearing condition.

3. Grinding or Rough Bearing Feel

  • Cause: Contamination, lack of lubrication, or bearing wear.
  • Solution: Clean and re-grease, or replace the bearings.

Comparing the SM-BB9000 to Other Bottom Brackets

Compared to the Dura-Ace SM-BB9100 [paid link], the SM-BB9000:

  • Has slightly larger bearings for better load distribution.
  • Lacks the updated seal design of the SM-BB9100 [paid link], making it more prone to contamination.
  • Is marginally heavier but offers similar performance.

FAQs About the SM-BB9000

1. How long does the SM-BB9000 last?

With proper maintenance, it can last 10,000–15,000 km before needing a bearing replacement.

2. Can I use the SM-BB9000 with a non-Shimano crankset?

It is optimized for Shimano Hollowtech II cranks, but adapters are available for some other brands.

3. Why is my bottom bracket making noise?

Creaking usually results from loose cups, lack of grease, or worn bearings. Reinstalling with proper lubrication often fixes the issue.

4. What torque should I use for the bottom bracket cups?

For BSA threaded models, Shimano recommends 35-50 Nm.

5. How often should I service my SM-BB9000?

Clean and re-grease every 3,000–5,000 km and check bearings for wear at 10,000 km.

Conclusion

The Shimano SM-BB9000 is a high-performance bottom bracket that, when properly installed and maintained, ensures smooth pedaling and long-lasting durability. By following the steps outlined in this guide, you can prevent common issues such as creaks, bearing wear, and misalignment, keeping your drivetrain in top shape.