K2 Flash Disc 110mm Wheels are hands down, the best wheels K2 has come out with. Crafted from dual urethanes, you get ultimate rebound for the inner core, and high durability on the outer. Sold individually, the Flash Disc wheels reduce drag and increase your speed, so you can train, or race, at the highest levels. Dual Urethanes - delivers the best of both, inner and outer cores, with durability and rebound. Aerodynamic Disc Hub - Offers speed and reduces drag, keeping you on your toes. SOLD INDIVIDUALLY.