Although bearing spacers are completely optional, many skateboarders use them. Skateboard bearing spacers fit into skateboard wheels between the bearings on each side of the wheel to reduce the weight distributed to each bearing. A lot of our customers have told us that it helps with their stability, tricks and much smoother turns. Since the spacers reduce the weight put on your bearings, they will also extend the life of your bearings. Skateboard bearing spacers come in packs of 4.