uxcell 6701-2RS Deep Groove Ball Bearings Z2 12mm x 18mm x 4mm Double Sealed Chrome Steel 10pcs

I used these on an OpenRC F1 build and they worked very well. The action is very smooth and the price is right!

I used on my rc heli and they work fine

I've had this going up to 15,000 rpm underwater with no problems. Definitely will keep buying from this seller. Price is perfect.

I was out for a run yesterday with my Redcat Gen8 and coming back I noticed an audible "tick" noise coming from the front right drive axle. I also noticed a "tick" in the tire rotation. I got home and pulled the front drives on both sides. The right side bearing had a major crack in it and a chunk missing. I immediately looked up and found this set of 10, UXCELL bearings, AND, I could get them the next day, today.You can see from the photos, the obvious problem, with the new bearing next to it. The real issue, I belive, is the bearings are exposed to rocks and such. I'm sure one got knocked and it cracked the race. I'm just happy that I got these bearings in a day, and they fit perfectly. I checked the spec's and the were tighter in the tolerance that the stock, which these replaced. Excellent quality, fit and service. Plus I have 8 more for back up when needed.