Originally Posted by
operator
A BB that costs 4x over the standard steel bearing version that lasts half as long. Your call. If you're not independently wealthy or sponsored, riding ceramic is a waste of $'s. Save them for something that actually matters, like Di2 for example.
Not sure how you figure they will only last half as long, but whatever.
I have ceramic bearings for my Campy BB, Derailleur Pulleys, and Zipp Hubs (Enduro Ceramics, not Zipps). Before I got any ceramic stuff I was running plain old steel bearings. So, do the wheels roll faster; Yes. Do the cranks spin easier; Yes. Do the derailleur pulleys spin faster; not really. Is it worth upgrading to ceramic bearings; yes, if you can afford it. Well, maybe the for the derailleur(and they are Super Record pulleys), but for the wheels and cranks they were. I will say that in my experience (what I've tried and seen brought into the shop) ceramics are really only beneficial (minus weight reduction) in areas that see a high number of RPMs. As for longevity, just read ANY of the science behind the product and the all tell how the wear out for the bearings is longer with ceramics; people who tell you otherwise are pissed they can't afford them.
If you can afford them, get them in high spinning areas or were you just want to drop weight.
Mike