Zipp CeramicSpeed 177 Freehub Freehub Body Shimano HG 11 11 00.1918.183.007

Lowest resistance hybrid ceramic (ceramic balls and steel cages) available Measurable wattage savings between 1.5 and 9 watts per bearing set, depending on the level and condition of your existing bearings Kits include Freehub body with CeramicSpeed bearin