Campy/Fulcrum-2 kit includes CeramicSpeed bearings for the cassette body. The cassette body on Campagnola and Fulcrum wheels uses two bearings. Balls for the hubs are ordered separately. Note that Fulcrum F5 is not compatible with these kits.
CeramicSpeed wheel bearings have a proven lifetime which is 3-5 times longer than standard wheel bearings, reducing the need for bearing maintenance.
The high velocity of wheel bearings means that bearing friction can have a huge impact on performance. A CeramicSpeed wheel kit reduces friction. The result is higher speed with the same effort and a higher top speed. You will feel the difference immediately.
If you are in doubt whether this kit will fit your wheels please check with a professional before ordering.