Bearing spacers precisely aligns bearings, wheel and axle to improve glide speed and free spin. Aluminium provides much better performance than plastic.
Long Sleeved Spacers are for 6mm axles usually used by K2 Skates
UFO Spacers are used for 8mm axles usually in most skates. Spacers come with extra ring to help align holes of the wheels
![[Australia - AusPower] - TOBWOLF Inline Skate Axle Spacer Screw Replacement, Aluminum Alloy Rollerblade Skate Wheel Bearing Spacer, Roller Skate Replacement Accessories with Axle & Axles Screws & Wrench 6mm Axle + 6mm Frame Spacer + 8mm Wheel Spacer](https://cdn.shopify.com/s/files/1/0595/9906/1172/products/B082LXQ2QW.jpg?v=1788431120&width=256)
