Originally Posted by chaadster

There is no plastic in the Hyper hubs other than the plastic bearing seals which any hub using cartridge bearings has.

Hyper hub service is tool-less and almost too easy, as the freehub can be pulled off without much force at all, setting up a situation where pawls might get dropped and lost.

But to the matter of Hyper bearings, they’re standard, commonly available size spec, inexpensive, and quite easy to replace, so replace them as you like. Full ceramic? All steel? Fresh hybrid? What you want…

Lastly, the 303S (which is the wheelset the OP was asking about) uses a 3-pawl freehub system whereas the Hypers use 6-pawls at 60º apart. I don’t know the number of engagement teeth/points they each have, but the Hypers click more quickly when spun, so they have more rapid engagement.