I've had these for 10 days already and one wheel however spins the longest is also the loudest and sounds almost like a loose bearing or the sound a go kart engine would make. Not all spin exactly as long and the same but some feel like the spin lasts as long as my original Abec 7's. But they do there job on the board in college conditions and I notice longer travel because of them. But putting in the factor that these were 15 dollars for just 8 bearings puts into question If these should of been less if there already making sounds and don't all spin equal and that the producer sells abec 11's that don't exist as a grade for manufacturing. I'm not a expert but also not a hardcore skater nor go in any water trying to keep them in proper conditions and always make sure each wheel is tightened accordingly. Also even did this review long boarding. [Edit] I was not expecting a refund I felt pretty bad when I got the email. I felt it was more of my fault for picking these bearings over other brands but if the manufacture responds with a full refund just to compensate with the customer's problems. Then this is the best brand overall. If in the future need anymore bearing's I will look towards this company first.
[edit pt2]
I was surprised when they sent me 2 packs of there bearing the prove there quality. I'm very surprised that they sent me 2 packs of bearings on top of a refund I did not request. I think this brand went beyond what a normal manufacturer would of and I will buy more bearings in the future from them because of there great consumer service. I would do even more stars if I could.

TL;DR Returned defective bearings.Was refunded AND company sent me 3 free sets that worked flawlessly. Will be sticking with Yellow Jacket for a LONG time and encouraging all my friends to do the same.

*Before I get into any of this, I just want to mention that this all happened within 4ish days of receiving my first set, so also props for speedy response times.

**Another note I thought about after writing this: Even non-dud bearings will be a bit audible freely spinning on their own or even fresh on the wheel, but they quiet down after a while and performance it perfect right out of the box.

I first ordered these bearings with spacers and washers in red because I was curious to take the path outside of the standard Bones Reds, which I had been so accustomed to. These run a bit cheaper and the color options are nice, so that was my primary motivation to even defer from Bones. It really all comes down to performance with me though. With my first set, it was lacking. 2 or 3 of the bearings spun without resistance and sound, but the rest were riddled with problems so I sent them immediately back and claimed a refund. I was a few clicks away from ordering a set of Bones when I got an email from NWM, the company that manufactures and selles Yellow Jacket Bearings. They were concerned with the fact that I had returned them and wanted to prove to me that they were indeed quality bearings, so they sent me 3 free sets. Each bearing from each of these sets performs flawlessly as the 2 or 3 in the first pack did. No issues whatsoever. If there's one thing I respect in a company, it's their determination to prove to their consumer base that they are giving them quality products at reasonable prices, which these guys certainly are. As with anything mass produced in the 21st century, there are bound to be a few duds and defects. If the system was designed to be perfect 100% of the time, prices would be 100% more expensive. My hat off to Yellow Jacket for still making sure I got what I needed in order to put my new board together, and then some. Definitely pick up your next set from these guys. Fantastic quality and even if you get extremely small chances of getting duds, these guys have your back and will make sure you know they treat their customers well. Yellow Jacket customer for life now and will be encouraging all my friends to purchase as well.

... and still frighteningly fast 🤌

They're skateboard bearings. What else is there to say.

I own a Magneto Mini cruiser skateboard and the bearings on there are good, however they did feel a bit slower for my taste. I wanted to achieve higher speeds while skateboarding and a friend of mine who also owns YellowJackets referred them to me. I purchased them and easily replaced the bearings on my board and was astonished on how big a difference they made; the wheels spin for so much longer now and I have been able to go so much faster with them on. It has been a bit over a month and I have had no problems with the bearings. If anything, my board feels as fast as it did when I first installed them.