Eccentrically 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 durability
