Undercover Anti-Rocker 45 White, 4-Pack Full set of high-quality UC grind wheels Long Aggressive Skating Pedigree Undercover (UC) is the leading urban, freestyle, and aggressive aftermarket wheel brand. With years of experience and research, UC offers a wide range of purpose-made wheels, making it easy for you to find the perfect setup to match your skating style. Fast, consistent grinding experience This is a full set of Undercover Anti-Rocker 45 grind wheels are specifically designed to deliver fast, consistent grinds on almost any surface. Made from the finest American polyurethane, the wheels create a fast grinding, incredibly abrasion-resistant wheel that still rolls, making it less likely to get hung-up on obstacles. The polyurethane is bonded to a strong hub to give you a solid and stable platform. The anti-rocker wheel is made with a special anti-flat spot material. The wheel has a 45mm diameter with a flat profile and super tough 101A hardness.