62mm 80A Nova material with blue urethane hub This “hybrid” wheel is perfect for smooth concrete or dirty tile surfaces when you must have grip. Because the hub is urethane, there are no debonding issues even with the softest material on the market. Shadow wheels roll faster than all others that claim the same grip. Best for: Sealed concrete or dusty floors (slick/slippery surface) Colors: Cloudy Clear on Blue hub