Onda Core Polymer Wheels Longboard Skateboard Deck - High strength fiberglass polymer blend with improved impact modifier additive for performance Trucks - Copolymer reinforced body with chrome-plated, heat-treated steel alloy shafts for extra strength Wheels - Copolymer rim and 7" 80A polyurethane tires with flat profile surface and sharp edges Torsion Shocks - 14 Patented, hand-cast polyurethane shocks with varying stiffness to adjust the carving for your ride (4 yellow, 4 blue, 4 red, 2 black)