Yeah, most peole upgrade their Formula bearings to something like Phil when they're shot from what I understand. Not a bad upgrade really, you'll make your bearings spin as smooth as Phils and not drop all that $$$. I'm about to throw some Phils in my crunchy rear Formula just about now as a matter of fact...

There's ceramic bearings too, but unless you're racing they're overkill, and some would argue still overkill if you are racing.