45x45 Degree Stainless Steel Angular Contact Bearing (30.5x41.8x6.5mm)
Best durable replacement for cyclists maintaining precision headset components.
Elevate your cycling experience with this premium stainless steel angular contact bearing from Enduro Bearings. Engineered for exceptional durability and smooth operation, its 45x45 degree contact angle is designed to reliably handle the stresses of cycling. Measuring 30.5x41.8x6.5mm, this bearing ensures a precise fit for compatible bicycle components, offering consistent performance and longevity. It's a dependable choice for maintaining your bike's integrity and delivering a superior ride.
$25.19
Owner Satisfaction
4.7
/ 5
Category Rank
68
/ 2113
#68 in Components
Price vs Category Average
-76%
Below average
Material
Stainless Steel
/ Stainless Steel
Who it's for
- Cyclists riding in wet or coastal environments
- Riders seeking stable steering performance under heavy loads
- Mechanics prioritizing long-term reliability and minimal maintenance
Who should skip it
- Competitive racers chasing every millisecond of rolling efficiency
- Gravity riders demanding maximum load capacity for extreme stress
- Budget-conscious shoppers looking for affordable replacement parts
Performance breakdown
Corrosion Resistance
High-grade stainless steel construction effectively combats rust in wet riding conditions.
Rotational Smoothness
Precision engineering ensures minimal friction for a fluid, responsive steering feel.
Load Distribution
The 45x45 degree contact angle expertly manages complex axial and radial forces.
Dimensional Precision
Exact tolerances guarantee a secure, play-free fit within compatible headtube assemblies.
Component Longevity
Built to endure high-stress environments without premature wear or mechanical failure.
Installation Ease
Standardized sizing allows for straightforward replacement by home mechanics and professionals.
Key Specs
Material
Stainless Steel
Contact Angle
45x45 Degrees
Dimensions
30.5mm x 41.8mm x 6.5mm
Model Number
ACB 4545 1125 SS-bx
Features
- Durable stainless steel construction
- Smooth bearing operation
- Designed for high longevity
- 45x45 degree angular contact
- Precision fit for bicycles
- Reliable cycling performance
What customers say
Customers overwhelmingly praise the Enduro Bearings stainless steel angular contact bearing for its exceptional performance and reliability. The stainless steel construction delivers superior durability and excellent corrosion resistance, making it ideal for challenging conditions. Users frequently note the smooth operation and enhanced precision provided by the angular contact design, leading to improved component responsiveness. These bearings maintain their silky smooth feel even after extensive use. While the initial investment is higher than standard options, the long lifespan and consistent performance make this a worthwhile purchase. Satisfaction stems from the product's premium build quality and dependable longevity.
Know before you buy
You should measure your current bearing with digital calipers or check your headset manufacturer's specifications for the inner diameter, outer diameter, and height. This bearing is specifically sized at 30.5mm ID, 41.8mm OD, and 6.5mm height, so it must match those dimensions exactly to seat properly.
The 45x45 degree angle refers to the chamfer on the inner and outer races, which is designed to seat perfectly into compatible integrated headset cups. This specific geometry ensures the bearing handles both radial and axial loads effectively, providing a stable and smooth steering feel.
Stainless steel offers superior corrosion resistance, making it an excellent choice if you ride in wet, muddy, or humid conditions. While it is slightly less hard than some chrome steel options, the added protection against rust significantly extends the lifespan of the bearing in harsh environments.
Enduro Bearings come pre-lubricated with high-quality, water-resistant grease designed for cycling applications. It is ready to install straight out of the box, though adding a light layer of waterproof grease to the headset cup during installation can provide extra protection against moisture.
No, this is an angular contact bearing (ACB) specifically designed for integrated headsets where the bearing drops directly into the frame's head tube. It will not work in traditional press-fit headset cups that require a different bearing profile.
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$25