Review on High-Quality Miniature Skateboard Bearings - 8X22X7mm Bearings for Smooth and Effortless Skating by Matt Conner

So I'm an engineer who grew up with my skateboard. I don't want to throw Bones Swiss on my 3D printer so I took them to get what I needed from them. They're pretty smooth, but I wouldn't even compare them to Bones Red or Zealous bearings. Again, I wouldn't compare the cost to them.