evo.com | Spitfire Skateboard Wheels > The Spitfire Formula Four 99d Red Lock In Full Skateboard Wheels are the ultimate choice for riders seeking exceptional performance. These wheels are crafted with Spitfire's renowned Formula Four urethane, guaranteeing unparalleled durability and grip on any terrain. With a 99D durometer rating, these wheels provide the perfect balance of speed and control, making them a must-have for street and park alike. Formula Four Urethane Formula Four urethane is unlike any other. Both in the streets and under high-speed stress tests in Spitfire's lab, Formula Four wheels retained more material, coned less and kept their original shapes and sizes longer than any other wheel. Medium Profile Your classic wheel shape, versatile all-around wheel for street/park skating. Smooth Surface Smooth wheels come with a shiny coating on the riding surface that feels grippy at first, but wears away quickly. Lock Ins Cut Asymmetrically cut, you can get the benefits of conical outer walls while the inside wall is cut straight, giving you a flat surface to lock in your grinds | Spitfire Formula Four 99d Red Lock In Full Skateboard Wheels 2025 - 55
