Aire Velo Bearings range of Hybrid ceramic bearings covers a large percentage of applications on a bike such as headsets, wheels, hubs, bottom brackets & pedals.
Hybrid ceramic bearings have stainless steel inner & outer races along with a PTFE cage, ceramic (Si3N4) balls & rubber seals (2RS).
Compared to steel balls, ceramic balls are lighter, smoother, stiffer, harder and corrosion resistant. These fundamental characteristics allow for a wide range of performance enhancements within the bearing and its application. Silicone Nitride (Si3N4) ceramic balls do not have as high toughness or ductility as steel but due to their high strength, stiffness and micro-structural make-up, they are actually much more durable than steel balls with a 100% increase in rolling contact fatigue life in comparison to steel.
Generally speaking you can expect Hybrid ceramic bearings to last between 2 and 5 times longer than standard all steel bearings, however this is highly dependent on operating conditions & other factors.