Cannondale Headshok Headset Reducer Lefty 1 1/8 Adapter - Headshox Head Tube Allows you to use 1-1/8" forks with existing Cannondale headset cups and bearings Machined Aluminum (6061-T6) - Designed and Modeled in the USA! No additional crown race required! Black Anodized Finish Works with straight steerer tubes only (non-tapered)