Spitfire Formula 4 Conical Full 97DU

The Spitfire Formula Four Conical Full 97DU skateboard wheels are manufactured as a set of four using Spitfire Formula Four urethane with a 97a (97DU) durometer hardness. They utilize a Conical Full shape, which incorporates a wider riding surface and cutaway sidewalls, and are offered in multiple diameters including 52 mm, 53 mm, 54 mm, 56 mm, and 58 mm, with corresponding width and riding surface dimensions that scale with size. The wheels have a smooth surface finish and are designed to resist flat spots and retain shape and size through use, constructed entirely from urethane with the Formula Four compound.