Elevate your skating journey with the Rollerblade Hydrogen SE 90mm Inline Skate Wheels 8-Pack. Designed using robust urethane, these wheels boost both speed and hold. Ensuring rigidity, the twin 6 flow core interface is complemented by ILQ-9 bearings that deliver swift, seamless rotations. This set comes preassembled for your ease, featuring 8 wheels, 16 bearings, and 8 spacers. Experience top-tier performance every time you skate!