Cane Creek ZN40 Series 52mm 1.5" Headset Bearing 36° x 45° Zinc Plated BAA1132
The new material is much more corrosion-resistant, which vastly increases the longevity of the 40 series headsets. Includes (1) 52mm sealed bearing for 1.5" steerer. 52mm od x40 id x 6.5mm thick.