FSA Headset Bearing - TH-870R - Red
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Team CyclesFsa Unisex Red Th-870R 1.1/8 41.8Mm 45/45 Sl Alloy Acb Headset Bearing In
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Product Information
Full details
The FSA Headset Bearing - TH-870R is designed for cyclists seeking a lightweight and durable headset component. Its primary benefit is a significant weight reduction compared to traditional steel bearings, enhancing bike performance. A potential consideration is its specific angle compatibility, requiring precise setup. This bearing features an ACB (Angular Contact Ball) design with an alloy housing, offering a 38% weight saving and available in both 45°x45° and 36°x45° configurations.
All features
| Model Part Number | TH-870R |
|---|---|
| Brand | FSA |
Extended Product Information
FAQs
What does ACB stand for and why is it beneficial?
ACB stands for Angular Contact Ball bearing. It's beneficial because it's designed to handle both radial and axial loads efficiently, providing smooth steering and increased durability compared to standard bearings.
How much lighter is this bearing compared to a steel one?
This FSA TH-870R bearing offers a 38% weight saving over comparable steel bearings.
Can I use this bearing with any headset?
No, this bearing has specific dimensions (41.8mm OD, 31.0mm ID, 8.0mm Height) and angle configurations (45°x45° or 36°x45°). You must ensure your headset is designed to accept these exact specifications.
What are the available angle options for this bearing?
The FSA TH-870R bearing is available in 45°x45° and 36°x45° versions.
How should I clean and maintain this headset bearing?
Gently wipe with a dry cloth. Avoid harsh chemicals. For best performance, inspect regularly and consider re-greasing or replacing based on usage and conditions.
Is the alloy housing prone to damage?
While lighter, alloy housings can be more susceptible to severe impact damage than steel. Proper installation and avoiding extreme impacts will help maintain its integrity.
Troubleshooting
Stiff steering or grinding sensation
Ensure the bearing is correctly seated and not overtightened. Check for dirt or debris inside the bearing and clean if necessary. If the issue persists, the bearing may be damaged and require replacement.
Premature wear or corrosion
This can occur if the bearing is exposed to excessive moisture or grit. Ensure seals are intact and consider more frequent cleaning and re-greasing, or replace the bearing if damage is evident.
Bearing does not fit properly
Verify that the headset dimensions (OD, ID, Height, Angle) exactly match the specifications of the TH-870R bearing. Using a bearing with incorrect dimensions will result in poor fit and performance.
Pros and Cons
Pros
- Significantly lighter than steel bearings.
- Smooth rotation due to ACB technology.
- Durable alloy construction.
- Available in specific angles for optimized fit.
Cons
- Requires precise angle matching for compatibility.
- Alloy housing may be less resistant to extreme impacts than steel.
- Specific dimensions (41.8mm OD, 31.0mm ID, 8.0mm Height) limit application to compatible headsets.
Setup, Compatibility & Care
Setup:
- Compatibility Check: Ensure your bicycle's head tube and fork steerer tube are designed to accommodate a bearing with an Outside Diameter of 41.8mm, an Inside Diameter of 31.0mm, and a Height of 8.0mm. Verify that the required angle (45°x45° or 36°x45°) matches your headset specification.
- Installation: Install the bearing carefully into the corresponding headset cup. Use appropriate headset press tools to avoid damage.
- Grease: Apply a thin layer of high-quality bearing grease to the bearing surfaces before installation to ensure smooth operation and protect against contamination.
Compatibility:
- This bearing is specifically designed for FSA headsets or other bicycle headsets that require the exact dimensions: 41.8mm OD, 31.0mm ID, 8.0mm Height, and either 45°x45° or 36°x45° angles.
- Always refer to your bicycle's or headset manufacturer's specifications to confirm compatibility before purchase.
Care:
- Cleaning: Clean the bearing gently with a soft, dry cloth. Avoid using harsh solvents or degreasers, as these can damage the bearing seals or remove essential lubrication.
- Lubrication: While sealed, periodic re-greasing or replacement of the bearing is recommended based on riding conditions and mileage to maintain optimal performance.
- Inspection: Regularly inspect the bearing for signs of wear, damage, or contamination. Replace if any issues are detected.