The Rollerblade Hydrogen SE 90mm Inline Skate Wheels 8-Pack brings an upgrade to your skating experience. Crafted with durable urethane, these wheels enhance speed and grip. The twin 6 flow core interface assures stiffness, while the ILQ-9 bearings promise smooth, fast spins. Preassembled for convenience, this pack includes 8 wheels, 16 bearings, and 8 spacers. Enjoy superior performance with each ride!