Popular FULLY Ceramic (ZR02) Bearings by Size
These are popular sizes bearings for fishing reels. Almost all of these are spool bearings for baitcasting reels, as that is the absolute best application for these bearings. Another popular application is the front and back of the oscillation worm of Shimano spinning reels.
Fully ceramic bearings have the lowest resistance of any bearing type, lower resistance even than the abec7 hybrid ceramic. Because of that, when installed on the spool of a baitcaster, the spool keeps spinning forever. These are also used for those forever-spinning fidgets that you’ve seen. You get the picture. They are also lighter, and because they have no metal, they have nothing to rust. DO NOT GREASE THESE!!!
| Size | Application |
|---|---|
| ZR02 | Spool bearing for baitcasting reels, front and back of oscillation worm in Shimano spinning reels |
FAQ
Are these bearings suitable for use in spinning reels?
Yes, these fully ceramic ZR02 bearings are commonly used in the front and back of the oscillation worm in Shimano spinning reels.
Can I grease these ceramic bearings?
No, do not grease these bearings. They are fully ceramic and designed to operate without lubrication.
What makes these bearings different from standard metal bearings?
Fully ceramic bearings have lower resistance than any metal or hybrid ceramic bearings, making them ideal for reducing friction and enabling longer spin times in baitcasting reels.




Warren Springer –
Installed the ZR02 bearings in my baitcaster and noticed a significant improvement in smoothness and spin duration. The reel feels more responsive and the spool spins longer without stopping. No greasing needed, which is a relief. Works perfectly as expected.
Ryan Russell –
Great fit for my Shimano spinning reel. The oscillation worm runs smoother now. Lightweight and no rust concerns. I’ve used them in multiple fishing conditions and they’ve held up well.
Jennifer Arnold –
The bearings fit well and perform better than the original ones. A bit more expensive, but the performance gain is worth it. Just make sure not to touch them with grease.
Kevin Ellison –
Used these in a new baitcaster and the spool spins continuously. No resistance, no noise. Very satisfied with the quality and durability. Perfect for long casting sessions.