Shimano Caliper Fixing Bolt - BR-R8170
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Product Information
Full details
The Shimano Caliper Fixing Bolt (BR-R8170) is an essential maintenance component designed specifically for riders using the Shimano Ultegra R8100 series disc brake system. It provides the critical structural connection required to securely mount your brake calipers to the frame or fork, ensuring consistent stopping power and safety. While it is a robust, genuine OEM part, it is strictly compatible with specific caliper models, requiring precision during installation to maintain the integrity of the hydraulic disc brake assembly.
All features
| Model Part Number | BR-R8170 |
|---|---|
| Brand | SHIMANO |
Extended Product Information
FAQs
Is this bolt compatible with Dura-Ace R9270 calipers?
While Shimano parts often share threads, always check your specific exploded view diagram. It is recommended to use the part number specifically listed for your caliper model.
Should I use Loctite on these bolts?
If the bolt comes with a pre-applied thread locker, you do not need more. If not, follow your frame manufacturer's guidelines regarding thread locking compounds.
Can I reuse the old bolt if it looks clean?
If the threads are clean and the head is not rounded, it is generally safe to reuse, but replacing it is recommended if you have any doubt about its integrity.
What is the recommended torque setting?
Refer to the Shimano dealer manual for the BR-R8170 series, which typically specifies a exact torque value in Newton-meters (Nm).
Does this pack include multiple bolts?
This product is typically sold as a single unit; verify the contents of your specific package upon arrival.
Troubleshooting
Bolt feels stiff while threading
Back the bolt out immediately, clean the threads on both the bolt and the frame, and ensure there is no cross-threading.
Caliper alignment is shifting after tightening
Loosen the fixing bolts slightly, squeeze the brake lever to center the caliper over the rotor, then tighten to the recommended torque spec.
Pros and Cons
Pros
- Ensures manufacturer-spec safety and reliability
- Precise compatibility with Ultegra R8100 series
- High-grade material prevents bolt head rounding
- Easy to source as a genuine replacement part
Cons
- Not backward compatible with older brake models
- Requires specific tools for torque application
- Small part easily lost during maintenance
Setup, Compatibility & Care
To install, ensure your mounting surfaces are clean and free of debris. Always use a calibrated torque wrench to tighten the bolt to the manufacturer's specified setting, as over-tightening can compromise the integrity of the bolt or the frame threads.
- Compatibility: Specifically intended for Shimano BR-R8170 brake calipers.
- Tools Required: Standard hex or Torx wrench (depending on specific bolt version) and a torque wrench.
- Care: Periodically check that the bolts remain tight, especially after long rides or transport. Apply a light layer of anti-seize or thread locker if recommended by your specific bike frame manufacturer, and keep the bolt head free of grit to ensure long-term usability.