*No Warranty*
Ceramic bearing = free speed with same effort.
C-Bear specialized in ceramic bearing for bi-cycle.
Ceramic hybrid bearing : ceramic balls are harder, higher heat resistance and rust free.
Right from the beginning (since 2007 its inception), Bart (founder of C-Bear) an avid cyclist, knows first hand and differentiates race (road) and cyclocross/mtb bi-cycle bearings.