Engineered for maximum performance, the Spitfire Formula Four Engine 29 wheels deliver precision and durability for serious skaters. These 54mm conical full wheels feature a 99D hardness rating, offering the ideal balance of grip and slide for technical tricks and smooth cruising. The Formula Four core technology ensures consistent speed and responsiveness across varied terrain. Built to withstand intense skating sessions, this set of four wheels is the choice of professionals who demand reliability and control.