B-543 2RS MAX | 1-9/16 x 2 x 9/32 inch | Cannondale Lefty Headset Bearing

B 543 2RS MAX - 1-1/2" Max-Type Headset Bearing - 1-1/2" Max-Type Bearing for Internal Headset featuring 52100 High-Carbon Chromium alloy races paired with grade 10 Balls. The Enduro line of headset bearings begin with chromium steel, Black Oxide finish A/C type and then offer full 440C stainless steel at the top. They are always engineered with the largest balls possible and dual lip seals riding in a micro-groove for ultimate protection against sweat and the elements. They are filled 90% with high pressure water proof grease, so you never have to guess if there is grease inside. Enduro Max-type bearings are designed without retainers to maximize the number of balls to spread the force over a greater surface area, pressure water and minimizing wear.