Ceramic Bearings Description :

OEM Number:61902/17 ,17287 bearing

Material :

Ring :  Zr02

Balls : Zr02

Cage : PTFE

With two sides PTFE seals

Dimension :

Inner diameter:17mm

Outer diameter:28mm

Width :7mm

Suitable for: A2Z brand XCR rear hubs, XCF hubs, Qinghao (CH Disc/HH series) hubs, Halo Mercury Rear Hub Halo Mercury hubs and many other bicycle hubs. 

For ceramic bearing ,we also can produce with material: Si3N4; SiC; ZrO2

Features:high speed ,high temperature working environment ,long working life