Shimano Bracket Fixing Bolt - Silver
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Product Information
Full details
The Shimano Bracket Fixing Bolt (Y5K498020) is a high-performance replacement component designed for serious cyclists and home mechanics who maintain specific Shimano XTR-level mountain bike drivetrains. It provides the essential structural integrity required to securely mount front derailleurs, ensuring smooth and precise shifting performance. While it is an exact, high-quality replacement part, users should note that it is compatible only with specific E-type and standard mounting configurations, requiring verification of the derailleur model number before purchase.
All features
| Colour | Silver |
|---|---|
| Model Part Number | 5K49802 |
| Brand | SHIMANO |
Extended Product Information
FAQs
Is this bolt compatible with non-Shimano derailleurs?
No, this bolt is specifically engineered for the dimensions and thread pitch of Shimano FD-M980 and FD-M970 series derailleurs.
Do I need to apply grease to the threads?
Applying a thin layer of bicycle-specific grease to the threads is recommended to prevent seizing and to ensure accurate torque readings.
What is the part number for this item?
The official Shimano part number is Y5K498020.
Can I use this on a road bike derailleur?
No, this part is designed specifically for the mountain bike (MTB) front derailleurs listed in the compatibility guide.
How often should I check this bolt?
It is good practice to check the tightness of your derailleur mounting bolts during every major drivetrain cleaning or before every significant race or long-distance ride.
Troubleshooting
Bolt does not thread into the derailleur bracket smoothly
Clean the threads on both the bolt and the derailleur body to remove grit, then verify you are aligning the bolt perfectly straight before turning.
Front derailleur still moves after tightening the bolt
Verify that you have not exceeded the torque limit; if the derailleur movement persists, check if the mounting hole on the frame or derailleur is stripped or damaged.
Pros and Cons
Pros
- Exact OEM fit ensures seamless installation
- Maintains structural integrity of the derailleur mount
- High-grade material prevents bolt stripping
- Specifically designed for top-tier Shimano drivetrain systems
Cons
- Limited compatibility with specific older derailleur models
- Requires precise torque settings to avoid damage
- Not intended for non-Shimano front derailleurs
Setup, Compatibility & Care
To install this bolt, ensure you have the correct metric hex key size as specified by your derailleur's technical documentation. Always clean the threads on the derailleur bracket before installation to prevent cross-threading. When tightening, it is highly recommended to use a calibrated torque wrench to adhere to Shimano's official torque specifications for the M980/M970 series, as overtightening can crack the derailleur mounting tab. Compatibility is strictly limited to the FD-M980-E, FD-M980, FD-M970-E, and FD-M970 models. Regularly inspect the bolt during your routine drivetrain cleaning to ensure it remains tight and free of debris.