Cane creek Angleset Semi-Integrated ZS44/28.6|EC56/40 HeadsetEccentrically machined ZeroStack bearing cups are designed to create a steeper or slacker head angle and are independent of head tube length Available as a kit that includes additional cups for + 0. 5, 1. 0 and 1. 5 degree adjustability (install on frame centerline axis and rotate 180 degree to change angle) Contoured and relieved 7075 T6 aluminum for minimized weight and maximized strength with self aligning black oxide steel bearing design for