Zipp CeramicSpeed 177 Freehub Body SRAM XD-R 12 00.1918.183.009

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 bearings pre-installed for easy installation onto the wheel SRAM Model ID: HU-SPP-A0