Hi, This is Amand Aviators. I was born and raised in California, USA but now I am living in Florida. I am a Scientist. I want to discuss skateboard wheels. Skate bearings can be utilized for many applications such as skateboards, scooters, quads, longboards and inlines in the industry. All these applications use the equal-sized bearings. If we talk about the Skateboard Wheels and Bearings, every skateboard wheel is prepared with two bearings and the space between them can be filled with a spacer that totally depends on you.