Dan - I'm a bit confused. One person's review here says that these bearings are "silent" and another says that they are "super noisy". That's a very extreme difference of opinion. Are they quiet or not? Would all Oust bearings (Moc 9, 7 and 5) have the same noise characteristics? Finally, do ceramic bearings have any effect on noise? (i.e. are they generally quieter or noisier than steel bearings). Thanks! ---- Dan Loveland Writes - I have ridden the Oust 9's for a long time and I would say they are really smooth and quiet. I am not sure what the other customer did with their bearings.

These are the best bearings, they are silent, roll very fast, and spun over 2 minutes out of the box! After two weeks they almost spin for 4 minutes and not to mention the IDS lube rocks on these too! GET THEM they are worth it.

These bearings are just as fast as my friends $110 bone swiss ceramics, but these bearings are super noisy no biggie though definitely recommend them for the price.

Bought these n just a month after 2 of the 8 bearings stucked! tried to clean them but didnd get any improvement... now i use 6 of these n 2 of my old SKF bearings. These OUST really roll 4 ever, but that only for as long as it least, n that doesnt mean too long. So these bearings r good, but 2 brokem bearings in 1 month... I aint buing these again... N my old n cheaper SKF roll faster n longer, n after 7 months of use none of them broke. N the shape of these bearings doenst protect agains dust any better than other bearings. My sugestion? Go with a better know brand, such as SKF, Bones, Black Panters. But if u got money to change your bearings every month or 2, go with OUST. (I ride a dervish)

Dan~ Do these Bearings come with spacers? If so what size are they? I also currently have some Lucky swiss bearings, Do you think these would be a decent upgrade? -- Dan Loveland Writes --- You will need to use 10mm width spacers. They do not come with the bearings. I would say they are a very good upgrade compared to your Luck Swiss bearings.