The CeramicSpeed Campagnolo 1 Wheel Kit is based around friction reduction for more speed. This version is compatible with Campagnolo or Fulcrum rim brake hubs with the exception of the Fulcrum R5. The kit comes with 60 CeramicSpeed balls which are coated to make them significantly harder than steel. This results in a lifetime that is three to five times greater than standard bearings. Due to the high velocity of bearings as you ride, this lack of friction can have a massive effect on your performance. With the CeramicSpeed Wheel Kit, you can assure that performance is as smooth as possible.