Zipp CeramicSpeed Bearing Kit: 30/60 Rear Hub

- Includes 61903 bearings and one grease syringe
- Measurable wattage savings between 1.5 and 9 watts per bearing set, depending on the level and condition of your existing bearings
- Note: 88 front and 188v9 rear hubs are on all 2014 and newer Zipp 202, 303, 404, 808
- One kit required for: Zipp 188v9, 30 and 60 rear hubs