FSA Crank Bolts - Black - M15
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Product Information
Full details
The FSA Crank Bolts (M15) are essential components designed for adult cyclists utilizing ISIS splined bottom bracket systems. These bolts provide a reliable, high-strength connection between your crankset and bottom bracket, ensuring stable power transfer during rides. While they offer exceptional durability and a sleek aesthetic, users should note that they are specifically engineered for the ISIS standard and are not compatible with square-taper or external bearing bottom brackets.
All features
| Age Group | adult |
|---|---|
| Colour | Black |
| Gender | Unisex |
| Model Part Number | 390-2040 |
| Brand | FSA |
Extended Product Information
FAQs
Are these bolts compatible with square-taper bottom brackets?
No, these bolts are designed specifically for ISIS splined bottom brackets.
What size hex tool do I need for these bolts?
These typically require an 8mm or 10mm hex wrench, depending on the specific crank arm design, though the bolt itself is M15.
Should I use Loctite on these bolts?
It is generally recommended to use bicycle-specific grease on the threads. If the bolt continues to loosen, consult your crank manufacturer's manual regarding the use of thread locker.
Can these be used on carbon cranksets?
Check your crankset manufacturer's guidelines, as some carbon setups require specific bolt hardware or integrated washers.
Is the set sold as a pair or a single unit?
Please check your specific packaging or vendor listing, as FSA crank bolts are often sold as a set to accommodate both sides of the crankset.
Troubleshooting
Bolt will not thread into the spindle
Ensure the threads are aligned perfectly. Cross-threading can damage the spindle; back it out and restart carefully.
Creaking sound while pedaling
Remove the bolts, clean the threads, apply fresh bicycle grease, and reinstall to the correct torque specification.
Bolt becomes loose after a ride
Check that you have torqued the bolt to the specific requirement for your crank model and verify the ISIS spline condition.
Pros and Cons
Pros
- High-strength material ensures long-term reliability
- Easy to install with standard hex tools
- Maintains secure crank attachment
- Professional black aesthetic
- Precise M15 thread fitment
Cons
- Not compatible with square-taper bottom brackets
- Requires specific tools for ISIS maintenance
- Limited to ISIS spline systems only
Setup, Compatibility & Care
To install these bolts, you will need a high-quality hex wrench. Ensure that the ISIS splines are clean and free of debris before insertion. Apply a small amount of bicycle-specific grease to the threads of the bolt to ensure smooth installation and future removal. Tighten the bolts to the manufacturer-recommended torque settings for your specific crankset to ensure a secure fit without stripping the internal threads. Regularly inspect the bolts after heavy riding sessions to ensure they remain tight and free from corrosion.