The graph below shows a comparison between two steel bearings skf and ntn and a ceramic bearing enduro.
Ceramic bike wheel bearings vs steel.
Built specifically for road or off road use.
Initially the enduro bearing has lower friction at around 600km of use the ceramic bearing has worn a track into the comparatively soft steel races and the bearing friction starts to increase dramatically.
When a bike with ceramic bearings goes over a bump the ball bearing which is harder than the steel race that contains it strikes the inner surface of the race.
The advantages of steel are not the only argument against ceramic bearings.
Because ceramic bearings are rounder with a smoother surface and more uniform size friction is reduced and that can contribute to a less energy required to turn the cranks or spin the wheels.
The first thing that strikes the eye when looking at bicycle bearings is the difference in price between steel bearings and hybrid ceramic bearings.
This is mostly due to the additional time spent to perfect a quality ceramic ball.
The folks at enduro bearings argue that for bicycles the materials are far more important than abec ratings and that for most applications abec 3 and 5 are appropriate for all things bicycle.
You choose your adventure we build the bearings to match.
Steel rings and ceramic balls are the gold standard for bicycle wheel bearings.
So for safety reasons ceramic wheel bearings on bicycles are in fact almost always hybrid design meaning ceramic balls on steel races.
Because ceramic races are more brittle than steel.
Cost of purchase for ceramic and steel bearings.
This impact leaves a very small dent or pit in the steel race.
Cracking a race could stop a wheel from turning instantly and no good comes of wheels permanently locking up on a bicycle.