Bearings
1.Size: 8 * 22 * 7+5.5 (Inner * Outer * Height) / Unit: mm
2. Hybrid Ceramic bearings do not need Grease it have special rustling sound Super High Speed Long Spin time.
3.Rolling elements:7 Black Ceramic Beads(Si3N4) High Temperature and Abrasion resistance High Revs.
4.Bearing with spacer a new upgrade experience avoiding the trouble of daily spacer loss
5.Use For: Inline Roller Skates Shoes Speed Inline Roller Skating Free Line Skate (Drift Board) Skate board Long Board Scooter Quad Skate