x2 3137C02ASSY1BlackBrick, Modified 2 x 2 with Wheels Red for Dually Tire, with Black Tires Smooth Small Dually (3137c02 / 7b)
x1 3137C01ASSY1BlackBrick, Modified 2 x 2 with Wheels Red for Single Tire, with Black Tires 14mm D. x 4mm Smooth Small Single (3137c01 / 3139)