This has been discussed countless times over many years. Ceramic bearings are a complete waste of money on a bicycle. Any part of a bicycle. Ceramic bearings are great for very high rpm applications, we're talking thousands of rpm. Not gonna happen on a bicycle. They're great for very high heat applications. Again, not gonna happen on a bicycle. They also perform best in a clean application. Once again, not likely on a bicycle. Any steel bearing you buy from Enduro will be fine.