Ceramic Vs Steel Bearings Bicycle

The ceramic balls are often silicon nitride or equivalent.

Ceramic vs steel bearings bicycle.

They ceramic bearings do run with less friction which offers a significant advantage in industrial applications running at 20 000 rpm. A tiny percentage reduction in friction here can equate to a worthwhile power saving but when you re only turning at 300 rpm as you do on a bicycle a small percentage increase in efficiency will make a negligible change to your power output. Most sealed ceramic bearings are actually hybrid ceramic bearings which combine a steel race with ceramic ball bearings. Geometrically the contact points inner and outer dimensions and thickness between steel and ceramic bearings is the same so they are interchangeable.

Cost of purchase for ceramic and steel bearings. Steel bearings the silicon nitride used in kogel ceramic bearing balls has a set of material properties making them perfect for bicycle wheel bearings. How to get the best performance from ceramic bearings ceramic speed. 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.

A ceramic bearing is also harder than steel bearings up to 30 which improves durability and they also don t rust so less maintenance should be required. On a bicycle which is considered a low speed application compared to a formula 1 car or motorcycle engine for example the ball bearing material itself steel or ceramic has little to no effect on the friction of the bearing assembly. This is mostly due to the additional time spent to perfect a quality ceramic ball. The material can be polished smoother than any metal reducing friction and wear.

The first thing that strikes the eye when looking at bicycle bearings is the difference in price between steel bearings and hybrid ceramic bearings.