Orangatang Stimulus 70 mm Freeride Longboard Skateboard Wheels (Set of 4) VERSATILE FREERIDE WHEELS  The Orangatang Stimulus is the perfect mid-sized longboard wheel for freestyle tricks, dancing, and freeriding. PERFECTLY SIZED  At 70mm in diameter, the Stimulus is large enough to carry plenty of speed and roll over debris while still being light and quick for tricks and slides. SMOOTH SLIDES  Rounded lips and a stone-ground contact patch ensure smooth, predictable slides right out of the box and throughout the life of the wheel. HAPPY THANE  The original Orangatang urethane formula is smooth, plush, and grippy with a buttery-smooth slide. STRONG, SUPPORTIVE CORE  The encapsulated core maintains a smooth ride and supports the lips for crisp slides and even wear.