Shimano BR-M8000 calliper fixing bolt unit - Y8J498020
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Product Information
Full details
This guide is for owners of Shimano BR-M8000 disc brake callipers needing a replacement fixing bolt. The key benefit is restoring secure calliper mounting with a genuine Shimano part, ensuring optimal brake performance and safety. A caveat is that this specific bolt is designed only for the BR-M8000 model, requiring verification of compatibility before purchase. This product is a genuine Shimano replacement fixing bolt unit, specifically M6 x 34.4 mm, designed for the BR-M8000 calliper.
All features
| Model Part Number | Y8J498020 |
|---|---|
| Brand | SHIMANO |
Extended Product Information
FAQs
Is this bolt compatible with the Shimano BR-M9000 calliper?
No, this Y8J498020 fixing bolt unit is specifically designed for the Shimano BR-M8000 calliper only and is not compatible with the BR-M9000 or other models.
What size Allen key is needed for this bolt?
Typically, an M6 bolt requires a 5mm Allen key for installation and removal.
Do I need to use a torque wrench?
It is highly recommended to use a torque wrench to tighten the bolt to the manufacturer's specified torque to prevent over-tightening or under-tightening, which can damage components or compromise safety.
How many bolts are included in this part number?
This part number (Y8J498020) typically refers to a single fixing bolt unit. You will need to purchase one for each mounting point on your calliper.
Where can I find the torque specification for this bolt?
Torque specifications are usually found in the official Shimano service manual for the BR-M8000 brake system. You can often find these on the Shimano website or by consulting a professional mechanic.
What should I do if I lost one of these bolts while riding?
If a bolt is lost during a ride, it is crucial to stop riding immediately as the calliper may become loose, affecting braking. Secure the calliper as best as possible and carefully make your way to a place where you can replace the bolt, ideally with a genuine Shimano replacement.
Troubleshooting
Bolt does not thread correctly
Ensure you are using the correct bolt (Y8J498020) for the BR-M8000 calliper and that the threads on both the bolt and the calliper mount are clean and undamaged.
Calliper feels loose after installation
Check that the bolt is fully tightened to the manufacturer's recommended torque specification. Ensure the calliper is properly seated against the mounting adapter or frame/fork.
Bolt head is stripped
If the Allen head is stripped, you may need specialized tools for removal. Replacement with a new genuine Shimano bolt is recommended once removed.
Pros and Cons
Pros
- Ensures perfect fit and function for BR-M8000 callipers.
- Made with quality materials for longevity.
- Direct replacement for a lost or damaged bolt.
- Helps maintain the safety and performance of your braking system.
Cons
- Only compatible with the Shimano BR-M8000 calliper model.
- May require specific tools for installation.
- Sold individually, so purchase enough for your needs.
Setup, Compatibility & Care
Compatibility: This fixing bolt unit is exclusively designed for the Shimano BR-M8000 disc brake calliper. Verify that your calliper model is indeed BR-M8000 before purchasing. It is not compatible with other Shimano calliper models or other brake brands.
Setup: Installation involves removing the old or damaged bolt and replacing it with the new Y8J498020 unit. Ensure the calliper is correctly positioned on the frame/fork mount before tightening the bolt. Use an appropriate Allen key (typically 5mm) to tighten the bolt securely. Consult a professional bike mechanic if you are unsure about the installation process.
Care: As a small metal component, the primary care involves keeping it clean and free from excessive dirt or corrosion. Periodically check its tightness, especially after significant use or maintenance. Store it in a clean, dry place if not currently installed.