WAVEBOARD Waveboard Nextreme urban wave in injection molded high quality thermoplastic polypropylene, steel torsion bar, wheels with safety lights and ball bearings. Table: concave for greater control of the feet. Surface: non-slip. Torsion bar: steel. Wheels: polyurethane fiber with high resistance and durability, ø 76 mm - with safety lights. Bearings: ABEC 7 precision ball bearings. Dimensions: 86.5x22x13 cm.