I have no experiance with ceramics in cycling aplications. HOWEVER I do own and rebiuld many fishing rods with them. they have negligible wieght on them but the increase casting distance considerably. I also have never had to replace them in any reel I have rebiult. so they must be lasting. Also i can actualy tell whether a reel has them in it by simple turning the handle. I also replace the pawl with a ceramic one as well. and in closing,the amount and type of oil orgrease used makes a big differance too.