【 Race Ready 】 This is a 1/32 scale plastic assembly kit model of the shaft-driven high-performance Mini 4WD racer, the Knuckle Breaker. The model’s semi-monocoque Super X chassis enables motor replacement from the chassis undersurface without detaching the body. Also features 24mm (diameter) / 9mm (width) slick tires and 2 sets of gears to choose from. You can assemble the model with either 3.5:1 or 4:1 gear ratios. The body features vertical fins from the cockpit sides to the tail section which provide superb stability at straight sections. Additionally, a wide range of Grade-Up Parts are available to further customize your machine.