Shimano BR-R9170 Calliper Fixing Bolt C - 20 mm Rear Mount
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Product Information
Full details
This genuine Shimano replacement part is designed for professional mechanics and cycling enthusiasts who require an exact OEM fit for BR-R9170 series hydraulic disc brake callipers. The primary benefit of this bolt is its precise engineering, which ensures the calliper remains perfectly aligned and securely fastened to the frame's 20 mm rear mount. A key caveat to note is that this bolt is specifically sized for a 20 mm rear mounting thickness; installing it on incompatible frame mounts may result in improper threading or unsafe braking performance.
All features
| Series | BR-R9170 |
|---|---|
| Model Part Number | Y8PU08010 |
| Brand | Shimano Spares |
Extended Product Information
FAQs
Can I use this bolt on a front mount?
No, this specific bolt is engineered for a 20 mm rear mount and may not provide the correct reach or safety margin for front mounting locations.
Is this a genuine Shimano part?
Yes, this is an authentic Shimano spare part sourced directly to maintain the high performance and safety standards of the BR-R9170 series.
Does this come with a washer?
Please refer to the specific part diagram for your BR-R9170 calliper; generally, Shimano calliper bolts are designed to work with the integrated hardware provided with the set.
How often should I replace these bolts?
These bolts should be replaced if they show signs of thread damage, corrosion, or if the hex socket head is beginning to strip.
Will this work with other brands of callipers?
No, this bolt is designed specifically for Shimano BR-R9170 series callipers and may not have the correct thread pitch for other manufacturers.
Troubleshooting
Bolt feels tight before reaching the frame mount
Back the bolt out and inspect the threads for debris or damage; ensure the bolt is perfectly perpendicular to the mount.
Calliper vibrates during braking
Ensure the bolt is tightened to the recommended torque specification and check that the mounting surface is flat.
Bolt head is rounding off
Always use a high-quality, perfectly fitting hex key to prevent damage to the bolt head; replace the bolt if the interface is compromised.
Pros and Cons
Pros
- Guaranteed compatibility with BR-R9170 systems
- Maintains manufacturer safety standards
- Corrosion-resistant construction
- Precise fit simplifies installation
- Ensures optimal calliper alignment
Cons
- Limited to 20 mm rear mount thickness only
- Requires specific tools for proper torque application
- Not interchangeable with different series callipers
Setup, Compatibility & Care
To install this bolt, ensure your frame's rear mounting point is clean and free of debris. Always use a calibrated torque wrench to tighten the bolt to the specific value listed in the Shimano BR-R9170 dealer manual (typically 6-8 Nm, but verify against your current model's documentation).
Compatibility: This part is exclusively intended for the Shimano BR-R9170 series. It is not compatible with standard mechanical callipers or older hydraulic series that use different thread pitches or lengths.
Care: Periodically check the torque of your calliper bolts as part of your pre-ride safety inspection. If you notice any signs of rust or rounded bolt heads, replace the part immediately to avoid failure during high-speed braking.