All REDS precision skateboard bearings from BONES come pre-lubricated with Speed Cream racing lubricant. This means if you ride a longer traditional skurfboard or kicktail skateboard, you'll still get a smooth ride around corners. You can easily disassemble them for cleaning and applying lubricant in the future. They'll also fit RipStik and RipStik G equipment without any need for resizing. Wheel bite won't push them out of alignment, so you can fit them on tight rides.