Premium Material Made from durable polyurethane material, designed to provide good grip and speed in all hardnesses and has excellent durability. 95A Hardness for Indoor Performance With 95A hardness, offering grip, speed, and durability. These long-lasting artistic wheels are competition quality and formulated to roll smoothly while providing a strong grip on the rink floor. Suitable Skating Styles: Jam, Derby, Speed, Session. Highlights The inner and outer edges of the hub are oversized, which reduces the amount of urethane on the edges of the wheel. This makes it easy to perform stops and offers excellent response. The center of the hub allows for more urethane, enhancing grip, increasing control, and improving ride quality. Note: The data are based on manual measurement; please allow a 1-3 cm error. Due to differences between lighting and monitor displays, there may be some color variation. Actual product may vary slightly.