Cannondale Headshok/Lefty Headset Upper Bearing Seal for carbon frame integrated headsets
Brass ring with black rubber seal. This model is for carbon frames and has an outer diameter of 60mm. This ring is required for proper spacing at installation of Lefty and Headshok steerer tubes and stems.
This has the largest outer diameter of the three sizes.
Kit includes one upper bearing seal. Photos of all 3 are for comparison only.