Very valid point given by da Butcher in that those ceramic balls still roll in a steel race, ergo any piece of dirt that gets in (and it will) will wear out the races, so I'm not really sure you'll get much more life out of them. The only ceramic bearings I would consider, actually not just the bearings but the entire BB, is an Enduro XD15 BB (http://www.enduroforkseals.com/id332.html). I considered buying one as Rush Sports had them on special at about R1500, which is a ton of money for what I normally consider a consumable. Enduro use a different steel for the races which according to their information outlasts and is more corrosion resistant than the "normal" steels used for bearing races. They make a great statement in their bumpf that the BB will outlast your frame, but only offer a 1 year warranty, which for a BB is pretty damn good. As for the balls, being silicon nitride (the long name for ceramic) will for sure last much longer than steel, and couple with the harder steel for the races, should make for a longer life, assuming you do a little TLC now and then. I wrote to Enduro asking them if I'd really experience any tangible benefits, this was the reply: "I would be happy to shed some light on the bearings for you. The main difference between the XD-15 and the standard ceramic bearings in the longevity. The XD-15 is designed to be a more maintenance free bearing than standard ceramic bearings hence the reason that we offer a one year warranty on the BB. However all bearings need grease so what we tell most people is to lube your bearings whenever you change your chain. With the chain already off pulling the cranks off is never too much trouble. If you do this you should be able to get a few years out of the XD-15 BB." In the end I left it as dropping 1.5k on a BB was just too much for me to swallow and with me not exactly being a threat to any podiums anytime soon, I figured my money was best spent elsewhere. But... here's the thing; us mountainbikers spend absolute fortunes on bikes and components that we "need". All those insanely light carbon bits, the anodised blingy bits we stick on our bikes, etc, etc. So don't let anyone tell you you don't need ceramic bearings or you won't really feel difference. How much difference did you feel when you stuck on those KCNC bar-ends that weight less than a cigarette? I reckon f'all, right? So if you want them, get them, you'll "know" they are a major improvement because that's how we justify spending so much money on anything else we buy. I'll still be buying that XD15 sometime - should shave at least 3 seconds off my time for the 3 Towers