Spitfire Sapphire 90D Wheels

Spitfire Sapphire Wheels are skateboard wheels constructed with a dual-durometer urethane, featuring a 90 A soft outer riding surface bonded to a 101 A Formula Four inner core for combined softness and structural support. They are manufactured in a radial shape with a medium width contact patch and rounded edges, available in diameters typically ranging from approximately 53 mm to 60 mm depending on size variant. The wheels are sold in sets of four and are made from 100 % urethane with Spitfire’s Formula Four material to resist flat spots. Sizes commonly include 53 mm, 54 mm, 56 mm, 58 mm, and 60 mm, all with a 90 A durometer outer rating and radial geometry suited to cruiser/filmer wheel profiles.