What Are Bearings?
Technically, bearings are those rings and balls compressed into one small package that’s about the size of a coin.
Their main job is to help your wheels roll super fast and smooth. Bearing size is universal across various board categories. You’ll often find them about 22mm in the outer diameter, 8mm in the inner diameter, and 7mm in width.
What Are The Components Of Bearings?
The main components of bearings are metal rings, shields, and rubber seal.
You’ll often find 7 parts making up a bearing:
C-ring: this thing locks everything into place
Bearing shield: this guards dust, moisture, or mud against entering the interior
Outer ring: the round exterior that all other parts fit into
Inner ring: the part that comes in direct contact with the axle
Balls: around 7-8 steel balls to help the bearings roll nicely
Ball retainer: also called Deltin Crown. It keeps the balls in place.
Rubber seal: seal everything up nice and tight.