R188 Fidget Spinner Replacement Ball Bearings. Hybrid Ceramic Silicon Nitride Si3N4. High speed, silent, open: best for hand spinners. 2 pack set. Prime, fast shipping. 1/4 x 1/2 x 3/16 inch

This is the best fidget spinner bearing I've found so far. I have a custom spinner (with tungsten weights), and have tried a dozen or so different bearings. My previous best was 8 minutes, but it was not as quiet as I wanted (noise = energy loss) and it had a slight clicking sound. With these bearings, it spins for 9 minutes, and is very quiet - just a whisper; which is about as good as I think I can expect. Excellent bearing; excellent price!

Update2: they send me out another bearing that works great. I guess my spinner works better with different bearings. Kudos to then for their customer service. They had me send they type of spinner I had, and they matched the bearing that came with it, and it spins for 6 min easy now. Thanks again.Update. The seller contacted me (which was unexpected) and offered to get me a bearing that would work better for my spinner, so props for that.Not great. The spinner I have would spin for 5+ minutes when I first got it. The bearings went bad, and I've tried to find some high quality replacements. These are not it. They spin for 2 1/2 minutes maybe. That from start to full stop.

This is the 3rd time I've tried these bearings. I can't recall the issues with the first batch. The second batch would accept any of my r188 buttons! But I guess the third time is a charm! These are NOT going to will any long spin contest BUT hold the phone!!! These bearing are SMOOOOTHHH!!!! Like butter!! If you have a clunky chunky spinner that feels terrible...put these guys in it and it may save that spinner!! I you want smooth..give these guys a chance!!

Great bearings! I've added a pair with my last 5 or 6 orders. They are super smooth and spin for quite awhile. I'd say an average of 3-5 mins, depending on the spinner you put them in. They're pretty delicate though so be careful not to be too rough when putting them in your spinner...

I can not believe how smooth and silent these spin. I haved tried so many bearings from acer pro to boca and all the generics etc. One drop bearings are smoothest u can get but if u want a fast hybrid ceramuc that is nearly just as smooth then get these. Seriously these are way under rated. Buy these or lose out on some of the best

These bearings seem pretty good quality and have such a tiny resistance they work great in spinners.

One worked, one didn't.

they work real well thanks.