B 543 2RS - 1 1/2" Angular Contact Headset Bearing - 1 9/16 x 2 x 9/32 inch
1-1/2 Angular Contact Bearing for Internal Headset features 52100 High-Carbon Chromium alloy races paired with grade 10 Balls, specifically designed for Cannondale Lefty systems.
The Enduro series of angular-contact headset bearings begins with Black Oxide treated Chromium Steel races, advances to full 440C stainless steel, and culminates in the top-tier XD-15 aerospace-stainless (both races and balls), backed by a lifetime guarantee. These bearings consistently incorporate the largest possible balls in their design, integrating dual-lip seals within a micro-groove (labyrinth), and are filled to 90% capacity with high-pressure waterproof grease. Engineered for uniform ball engagement, Enduro Angular Contact (A/C) bearings distribute force across a larger surface area, resulting in reduced friction, minimized wear, and extended lifespan.
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