Blue Dragon54mm Conical WheelATU Formal99a DuroArtwork by Lewis Davis.Conical Shape: A wheel with a wide riding surface area, used to provide increased control and slideability. The side walls cone in slightly, to a flat edge - allowing for better connection in grinds on street and transition.ATU Formula: All Terrain Urethane, is a premium wheel formula which has been specially designed for versatility and durability. Street or park, ATU formula will perform at it’s best. Sliding on command, gripping surfaces when required and fast as fuck! Sabbath Blue Dragon Conical ATU 99A Skateboard Wheels 54mm