The Infinity 100 RTR wheel by Powerslides is designed for high-performance training and athletic skating. The Infinity wheels use polyurethane (PU) in Race Performance (RP) quality from Powerslides for a smooth, fast roll and long-lasting performance. A hardness of 85A provides the perfect balance of grip and rolling behavior. This 100-mm wheel comes pre-assembled with WICKED ABEC 9 bearings, making it ready to ride right away, available in a pack of four.