Micro ACB 36x45 Stainless 1-1/8" Headset Bearing
Best replacement for cyclists seeking smooth and reliable steering performance.
Ensure smooth and precise steering with the FSA Micro ACB 36x45 Headset Bearing. Engineered from durable stainless steel, this component utilizes Angular Contact Ball (ACB) bearings for reliable performance and longevity. Designed for standard 1-1/8" head tubes, it facilitates fluid fork rotation, enhancing rider control and comfort. This high-quality bearing is built to maintain your bike's responsiveness through consistent, dependable operation, making it an excellent replacement or upgrade.
$22.49
Owner Satisfaction
4.6
/ 5
Category Rank
417
/ 2104
#417 in Components
Price vs Category Average
-78%
Below average
Size
118
/ -/"
Who it's for
- All-weather cyclists riding in wet or corrosive environments
- Performance riders demanding smooth and responsive steering control
- Mechanics seeking a precise, play-free headset fit
Who should skip it
- Budget-conscious riders prioritizing low-cost replacement parts
- Cyclists with non-standard or incompatible headset systems
- Home mechanics inexperienced with precise bearing pre-load adjustments
Performance breakdown
Corrosion Resistance
Stainless steel construction effectively combats rust in wet or humid conditions.
Steering Precision
Angular contact design eliminates play for a crisp, responsive front end.
Rotational Smoothness
High-grade ball bearings ensure fluid movement during every handlebar turn.
Installation Compatibility
Standard sizing makes this a straightforward drop-in replacement for most bikes.
Component Longevity
Built to withstand high-stress loads while maintaining consistent mechanical integrity.
Load Distribution
ACB geometry handles axial and radial forces with impressive stability.
Key Specs
Size
1-1/8"
Bearing Type
ACB (Angular Contact Ball)
Material
Stainless Steel
Model
Micro ACB 36x45
Part Number
160-6465
Features
- Durable stainless steel construction
- Smooth ACB bearing performance
- Standard 1-1/8" compatibility
- Precise steering control
- Designed for longevity
- Facilitates smooth fork rotation
What customers say
Customers highly praise the FSA Micro ACB 36x45 Stainless Headset Bearing for its superior quality and durability. The core theme centers on the smooth, precise steering feel it delivers, effectively removing any gritty sensations from the headset. The stainless steel construction is a significant advantage, offering excellent corrosion resistance ideal for wet weather riding and ensuring long term reliability. While the initial price may be higher than generic options, users agree the enhanced performance and extended lifespan provide excellent value. This component is recognized as a worthwhile upgrade that consistently improves the overall riding experience through dependable, high quality engineering.
Know before you buy
The 36x45 refers to the internal and external chamfer angles of the bearing race. It is critical to match these angles to your existing headset cups and compression ring to ensure a proper, safe fit.
While it fits standard 1-1/8 inch head tubes, you must verify that your current headset assembly requires a 36x45 degree angular contact bearing. If your frame requires a different contact angle, this bearing will not seat correctly.
Stainless steel offers superior resistance to corrosion and rust, especially if you ride in wet or humid conditions. It is a durable upgrade that helps maintain smooth steering performance over a longer lifespan.
ACB bearings are specifically engineered to handle both radial and axial loads simultaneously. This design provides better support for the steering forces applied to your fork, resulting in more precise handling and less play in the headset.
If your headset is showing signs of wear, it is generally recommended to replace both the top and bottom bearings at the same time. This ensures uniform movement and prevents the older, worn bearing from causing uneven stress on the new one.
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