How to Install, Adjust, and Maintain the SM-BB5700 Bottom Bracket

The Shimano SM-BB5700 [paid link] bottom bracket is a key component in the Shimano 105 5700 groupset, designed for road cyclists who need a reliable, smooth, and durable bottom bracket. Proper installation, adjustment, and maintenance are crucial to ensure longevity and optimal pedaling efficiency.

This guide covers everything you need to know about setting up and maintaining the SM-BB5700 [paid link], from installation to troubleshooting common issues.

Tools Required

To install and service the SM-BB5700 [paid link], you will need the following tools:

Shimano TL-FC32 [paid link] or TL-FC36 [paid link] bottom bracket tool [paid link]
5mm Allen wrench [paid link]
Torque wrench [paid link] (recommended)
Grease (Shimano-approved or equivalent)
Clean rag or shop towels
Bottom bracket facing tool (if necessary)

Step-by-Step Installation Guide for SM-BB5700

1. Prepare the Bottom Bracket Shell

Before installing the SM-BB5700, the bottom bracket shell must be clean and properly faced.

Remove any old grease, dirt, or debris from the bottom bracket shell.
Check the shell for damage or uneven surfaces. If necessary, use a bottom bracket facing tool to ensure a smooth and even interface.

2. Apply Grease to the Threads

Apply a thin layer of anti-seize compound or grease to the bottom bracket threads. This prevents corrosion and makes future removal easier.

3. Install the Bottom Bracket Cups

The SM-BB5700 uses an external bearing design with left and right cups.

Drive-side installation: Thread the right-side cup (marked “R”) clockwise into the bottom bracket shell. Hand-tighten it first.
Non-drive-side installation: Thread the left-side cup (marked “L”) counterclockwise. Hand-tighten it.

4. Tighten to the Correct Torque

Use the Shimano TL-FC32 [paid link] or TL-FC36 [paid link] tool to tighten each cup to 35-50 Nm. A torque wrench [paid link] ensures proper tightening.

5. Install the Crankset

Slide the Hollowtech II crankset spindle through the bottom bracket.
Align and attach the left crank arm, securing it with the pinch bolts.
Tighten the preload cap using a 5mm Allen wrench [paid link], ensuring there is no lateral movement.

Adjusting the SM-BB5700 for Optimal Performance

1. Check for Play in the Crankset

After installation, rotate the cranks to ensure smooth movement.
Hold the crank arms and check for lateral play by gently moving them side to side. If movement is detected, tighten the preload cap slightly.

2. Re-Torque the Pinch Bolts

Once play is eliminated, tighten the crank arm pinch bolts evenly to 10-12 Nm to prevent uneven pressure on the spindle.

3. Test the Rotation

Spin the crankset and check for any grinding or resistance. If excessive drag is present, ensure the bottom bracket shell is properly faced and greased.

Routine Maintenance for the SM-BB5700

1. Cleaning the Bottom Bracket

Dirt and grime can build up over time, leading to reduced performance. Follow these steps to keep your bottom bracket clean:

Remove the crankset and inspect the bottom bracket bearings.
Use a rag and degreaser to clean the external bearing surfaces.
If dirt has penetrated the bearings, flush them with isopropyl alcohol or a light solvent and re-grease.

2. Checking for Wear and Replacing Bearings

The SM-BB5700 uses sealed bearings, which may wear over time. Signs of wear include:

Grinding or rough rotation
Increased resistance when pedaling
Visible rust or corrosion

If wear is detected, replacing the bottom bracket is recommended. Since the SM-BB5700 is a cartridge-style bottom bracket, it is not user-serviceable, meaning the entire unit must be replaced.

3. Lubrication and Greasing

Apply a small amount of grease to the bearing contact points during reassembly.
Use waterproof grease to prevent contamination from moisture.

Troubleshooting Common Issues

1. Creaking or Clicking Noises

Ensure the bottom bracket is properly greased and torqued.
Check if the bottom bracket shell is misaligned or dirty.
Inspect the crank arm interface for worn splines or loose bolts.

2. Grinding or Stiff Rotation

Inspect for dirt or contamination inside the bearings.
Check for over-tightened preload caps and adjust accordingly.
Ensure the bottom bracket shell is properly faced and aligned.

3. Bottom Bracket Play or Looseness

Re-tighten the bottom bracket cups to the correct torque.
Check the crank arm pinch bolts for proper tightening.

FAQs

1. How long does the SM-BB5700 bottom bracket last?

The lifespan depends on riding conditions and maintenance. Generally, it lasts 5,000-10,000 miles with proper care.

2. Can I service the bearings in an SM-BB5700?

No, the SM-BB5700 has sealed bearings that are not user-serviceable. If worn, the entire bottom bracket must be replaced.

3. What grease should I use when installing the SM-BB5700?

Use Shimano-approved grease or any high-quality waterproof grease to prevent corrosion and seizing.

4. How do I know if my bottom bracket is worn out?

Signs of wear include creaking noises, increased resistance, or play in the crankset. If these issues persist after cleaning and adjustment, replacement is recommended.

5. Is the SM-BB5700 compatible with other cranksets?

The SM-BB5700 is designed for Shimano Hollowtech II cranksets. Compatibility with non-Shimano cranksets depends on spindle diameter and fitment.

6. Can I use the SM-BB5700 on a carbon frame?

Yes, but ensure the bottom bracket shell is properly faced, and use carbon-safe grease if necessary.

Conclusion

The Shimano SM-BB5700 bottom bracket is a durable and efficient component, but proper installation, adjustment, and maintenance are crucial for longevity. By following this guide, you can prevent common issues and keep your drivetrain running smoothly.