Enduro ACB 4545 4252 SS 1-1/2 Angular Headset Bearing 42x52x7mm 45x45
Enduro ACB 4545 4252 SS 1-1/2 Angular Headset Bearing 42x52x7mm 45x45 is backordered and will ship as soon as it is back in stock.
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Premium stainless steel angular-contact bearing engineered for demanding headset applications. Constructed with 440C stainless steel balls and races, this component delivers exceptional corrosion resistance in challenging environments. Sized at 42x52x7mm with 45-degree contact angles, it's optimized for aero cable routing systems and commonly specified as the upper bearing in high-performance headset assemblies. Known in the industry by part number AC4252, this bearing combines durability with precision engineering for cyclists demanding reliability.
Not all stainless steel is created equal.
Enduro's 440C stainless steel angular-contact bearing represents the pinnacle of corrosion-resistant headset technology. This premium alloy delivers superior strength, hardness, and wear resistance compared to standard 440-series alternatives, achieved through specialized heat treatment and cryogenic processing. While marginally softer than conventional 52100 chromium steel, 440C excels in wet conditions where moisture, perspiration, and sports drink exposure threaten bearing longevity. Paired with LLB-type seals and Almagard 3752 grease for enhanced waterproofing, this 42x52x7mm bearing provides the durability demanded by serious cyclists. Backed by a lifetime warranty and trusted by leading headset manufacturers worldwide.
Engineered for maximum durability, Enduro's angular-contact headset bearing features 440C stainless steel construction throughout races and balls. The design incorporates oversized balls for enhanced load distribution, dual-lip seals seated in a labyrinth micro-groove, and 90% fill of high-pressure waterproof grease for superior protection against moisture and perspiration. The angular-contact geometry ensures all balls engage uniformly, spreading forces across a larger surface area to reduce wear and extend bearing life. Purpose-built for cyclists demanding uncompromising reliability in challenging conditions.
SPECIFICATIONS
- Static load - 917lbf / 408kN
- Weight - 24.9g
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