This is the electric powered, radio controlled, 1/10 scale RJ Speed Sportsman Racer On-Road Car Kit. FEATURES: Chassis: Composite fiberglass, 0.098" (2.5mm) thick, fits most 1/10 scale 200mm wide race car bodies Motor Mount: Composite fiberglass Differential: Ball type Diff Gear: Composite plastic 48 pitch, 81 tooth Pinion Gear: Steel 48 pitch Front Suspension: Spring type Rear Axle: Solid, constructed of stainless steel, adjustable height Caster: Adjustable, caster/toe-in refers to the angle of the front suspension when viewed from the side of the car in relation to the chassis Camber: Non-adjustable, camber refers to the angle of the tops of the tires from vertical when viewed from front or behind vehicle Tires: Mounted and trued spec foam Front, 1.2" (29.5mm) wide, 2.4" (60.9mm) diameter, mounted to black plastic wheels Rear, 2" (52mm) wide, 2.4" (60.9mm) diameter Steering: Direct linkage Body: Clear untrimmed Lexan INCLUDES: Kit with body, 48P pinion and diff gears, mounted foam tires, decals window masks, and instructions REQUIRES: Radio: 2-channel with standard size steering servo Servo Saver: To match brand of servo Motor: 540 or 550 size Battery; 4 or 6-cell Battery Charger: To match selected battery Building and track equipment SPECS: Vehicle- Length: 18" (457mm) Width: 8.25" (209mm) Height: 4.75" (120mm) Wheelbase: 10.25" (260mm) Body- Length: 17.5" (444mm) Width: 8.2" (209mm) Height: 4.6" (117mm) jxs 01/27/12 ir/jxs