[captain harlock]

Well, most ceramics would cost you 100 dollars and they surely weigh less than steel bearings, but I dont really know how much( some says 40% lighter and its possibely true). The real thing about ceramic is SMOOTHNESS , RUST RESISTENCE and ITS ORIGINALLY MADE FOR HIGH PRESSURE FORCE( aka brushless and nitro) I've tried it once and then I've never let go. They are truely what they claim. However, do not expect any noticeable increase in speed and performance, but you can expect a more of longevity in terms of life and consistency.