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Enduro Sealed Angular Contact Headset Bearing 4545 S8551 BO - 1 3/8" - 36.8 x 45.8 x 6.5mm (45 x 45 deg)

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ACB 4545 S8551 BO - 1 3/8" Angular Contact, Black-Oxide Headset Bearing - 36.8 x 45.8 x 6.5mm (45 x 45 deg)

Angular-contact headset bearings are equipped with anti-corrosion Black Oxide/Magnetite coated 52100 High-Carbon Chromium alloy races coupled with grade 10 Balls, offering extended worry-free performance due to the added corrosion resistance provided by the Black Oxide coating.

The Enduro series of angular-contact headset bearings commences with Black Oxide treated Chromium Steel races, progresses to complete 440C stainless steel, and culminates with the pinnacle of the line, XD-15 aerospace-stainless (comprising both races and balls), which is guaranteed for a lifetime. These bearings are consistently designed with the largest possible balls and incorporate dual-lip seals navigating within a micro-groove (labyrinth). They are filled to 90% capacity with high-pressure waterproof grease, ensuring optimal protection against sweat and external elements. Enduro Angular Contact (A/C) bearings are engineered to engage all balls, distributing force across a larger surface area, thereby reducing friction, minimizing wear, and maximizing their operational lifespan.

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