Tilt Wheel Blaster for Scooters (Dual Layer) Hard Outer Layer of Urethane for Speed and Durability Softer Inner Layer of Urethane for Better Rebound Adaptive Inner Ring (A.I.R.) Allows for Flexing / Improves Rebound of Scooter Wheels Bond Guard Prevents De-Hubbing of Wheels Better Rebound Efficiency Than Ever Before For Faster, Smoother Ride Single Urethane Layer Blaster Wheel with Extra Strength and Grip Wide Wheel Protects the Anodized Color Coating 110mm Diameter Blaster Scooter Wheels PRICE IS FOR ONE WHEEL