content: Are you saying they own it on ceramic bearings? Or ceramic bearings used specifically for cars/vehicles? Because from my experience in selling ball bearings ceramics were used in very specialized situations; namely high heat applications (talking 1000+°), super high speed (excess of 25K RPM), or simply hard to reach areas that could not be lubed using traditional bearing grease/oil, the latter being very rare situations. Ceramic bearings are insanely expensive compared to their metal counterparts ( a $20 metal bearing would surpass $200 in a ceramic version) and not quite as easy to come by all the time. While it is true their friction is lower, their benefits, I would venture to guess, would not surpass their costs.  I of course would love to be wrong.