The Shimano SM-BBR60 [paid link] is a Hollowtech II bottom bracket designed for use with road bike cranksets, especially from the Ultegra and 105 series. Known for its lightweight design and smooth operation, this bottom bracket is a popular choice among enthusiasts and competitive cyclists. However, improper installation, adjustment, or component incompatibility can lead to several issues that affect performance, longevity, and rider experience.
This guide will address the most common setup issues associated with the SM-BBR60 [paid link], offering detailed solutions and preventative strategies for each problem.
Understanding the SM-BBR60 Design
The SM-BBR60 [paid link] is part of Shimano’s Hollowtech II system and is compatible with 24 mm spindle cranksets. It features smaller external cups compared to previous models, reducing weight and increasing Q-factor efficiency. The unit includes two threaded cups (left and right), pre-installed bearing seals, and a plastic inner sleeve for added protection.
Common setup problems usually stem from improper torque application, contamination during installation, misalignment with the bottom bracket shell, or incorrect shell type compatibility.
Incorrect Bottom Bracket Shell Compatibility
One of the most frequently encountered problems involves using the SM-BBR60 with incompatible bottom bracket shells. This bottom bracket is specifically designed for BSA (British Standard Thread) frames with a 68 mm shell width.
Symptoms:
- Cross-threading during installation
- Loose fit or misaligned threads
- Creaking noises from the bottom bracket area
Solution:
- Confirm your frame uses a BSA threaded shell (typically 1.37″ x 24 TPI).
- Avoid using adapters unless specified by Shimano.
- Clean threads thoroughly before installation.
- Apply anti-seize compound to the threads to prevent galvanic corrosion and ease removal.
Cross-Threading and Over-Tightening
Improper threading or excessive torque application can severely damage the bottom bracket shell or cups. The SM-BBR60 has specific torque values that must be adhered to during installation.
Symptoms:
- Resistance during cup threading
- Damaged threads on the shell or cup
- Cups difficult to remove later
Solution:
- Always thread the cups by hand before using a tool.
- Use a Shimano TL-FC25 adapter with a Hollowtech II BB tool for proper engagement.
- Torque to 35–50 Nm, as per Shimano’s specification.
- Never force the threads; if resistance is felt early, remove and inspect both shell and cup.
Persistent Creaking Under Load
A common issue reported with the SM-BBR60 is creaking during pedaling. This can originate from multiple sources, including the interface between the crank spindle and the bearing, improper preload, or lack of lubrication.
Symptoms:
- Intermittent or continuous creaking during pedaling
- Noise only under load or high torque situations
Solution:
- Ensure the bottom bracket cups are torqued correctly.
- Apply grease to the crank spindle interface and contact surfaces.
- Verify the crank arm bolts are torqued to specification (12–14 Nm).
- Check for frame integrity—micro-cracks around the BB shell can also cause noise.
Incorrect Preload Adjustment on Crankset
The SM-BBR60 doesn’t include an adjustable preload mechanism. Instead, preload is applied via the non-drive side crank arm cap (usually plastic) on compatible Shimano cranksets.
Symptoms:
- Play in crank arms (side-to-side movement)
- Resistance when spinning cranks by hand
- Bearing drag or premature wear
Solution:
- Use Shimano’s TL-FC16 [paid link] or TL-FC18 tool to tighten the crank arm preload cap.
- Eliminate play before tightening the pinch bolts.
- Always torque the pinch bolts in an alternating pattern to 12–14 Nm.
- Avoid overtightening the preload cap; it’s not meant to secure the crank, only to eliminate play.
Contamination and Premature Bearing Wear
Improper installation or riding in wet conditions without regular maintenance can introduce contaminants into the bearings, leading to premature wear.
Symptoms:
- Grinding or roughness when spinning cranks
- Rust-colored grease leaking from the cups
- Creaking despite correct installation
Solution:
- Use the provided plastic inner sleeve to prevent water ingress through the frame.
- Ensure the bearing seals are intact and properly seated.
- Apply waterproof grease to the inner surfaces before pressing in the cups.
- Consider servicing or replacing the unit after 5,000–10,000 km depending on riding conditions.
Misalignment During Installation
Misalignment between the bottom bracket shell and the cups can introduce unnecessary stress and reduce bearing life.
Symptoms:
- Uneven wear on the crank spindle
- Excessive bearing drag
- Difficulty threading one or both cups
Solution:
- Face and chase the bottom bracket shell using professional tools to ensure perfect alignment and thread cleanliness.
- Always inspect the shell before installation and address any damage or deformation.
- Use a torque wrench [paid link] to ensure balanced tightening between the left and right cups.
Thread Locker vs. Anti-Seize Debate
Some mechanics use thread locker compounds (e.g., Loctite) during installation to prevent loosening. However, Shimano recommends anti-seize to prevent corrosion.
Best Practice:
- For aluminum frames or high-humidity environments, use anti-seize.
- For steel frames or when creaking persists, a medium-strength thread locker may be considered, but it’s not officially recommended by Shimano.
- Never use permanent thread locker as it can damage the cups during removal.
Conclusion
The Shimano SM-BBR60 is a high-quality bottom bracket that, when installed and maintained correctly, provides smooth and durable performance for thousands of kilometers. Most issues arise not from the component itself but from improper installation techniques or compatibility oversights.
By understanding the root causes of common problems—such as creaking, play, and premature wear—cyclists and mechanics alike can ensure optimal performance and longevity from this bottom bracket.