Powerslides Infinity 90 RTR wheel is made with a focus on high-performance training and fitness skating. The Infinity wheels use Powerslides Race Performance (RP) quality polyurethane (PU) for smooth and fast-rolling and long-lasting performance. A hardness of 85A is the perfect mixture of grip and roll. This 90mm wheel comes pre-assembled with ABEC 9 WICKED bearings so it’s READY TO ROLL in a pack of 4.