The Spitfire F1 Firelighters Mash Up Wheels are lighter, faster, and longer lasting than all others. Chemically bonding a new lightweight air hub with super fast, true flat spot resistant urethane, F1 Firelighters offer unmatched core wheel performance. USA made. Guaranteed. 15% lighter air hubs. Faster than the rest. 100DU. Graphics at one side. Available in colorways as seen below. Colors are limited to specific size. See colors below for correlating size. Sizes available as seen below. Wheels sold in set of four.