The set contains 2 x 61802, 2 x 61803 and 2 x 61902 ceramic bearings for one front and one rear hub.
Bearing Material: Chrome Steel 52100
Ball Material: Ceramic SI3N4
Enclosure #: Two Seals
Enclosure Material: Rubber Seal
Lube: Kluber NBU12/300KP
China Ceramic Manufacturer bearings have a proven lifetime which is 3-5 times longer than standard wheel bearings, reducing the need for bearing maintenance.