From the Break Gouang, the Gou Custom Series "Giant Wheel Pack" has a diameter of 0.08 inch (2 mm) larger than the normal wheels, and can freely adjust the body of the Gouang body. (Set Contents) Wheels x 4, Spikes x 2. *This product is a product exclusively for the Break Gouang unit (sold separately). This product cannot be played alone. (Everything other than those included with this product is sold separately. )