This is the electric powered, radio controlled, 1/10 scale TRF201 Off-Road Buggy Kit from Tamiya. Chassis: Fiberglass reinforced nylon resin bathtub style Drive: Rear wheel Gearbox: Sealed, adjustable slipper clutch Differential: Ball type Front Wheels: Dish type specific to TRF201, IFMAR compliant, 2.2" (55mm) diameter, 1" (25.4mm) wide Rear Wheels: Dish type 2.2" (55mm) diameter, 1.5" (37.5mm) wide (rear wheels from Tamiya DB01 and TRF511/501 are also compatible) Body: Version 1 clear untrimmed buggy with rounded/wide and straight/ narrow rear wings Shocks: Oil filled, aluminum body Spur Gear: Composite construction, 79 tooth 48 pitch Suspension: Fully adjustable 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: Adjustable front and rear, camber refers to the angle of the tops of the tires from vertical when viewed from front or behind vehicle Steering: Bell-crank with servo saver TRF201 Off-Road Buggy Kit with wheels, shocks, shock oil, decals body, two rear wings and instruction manual Radio: 2-channel with standard size steering servo Electronic Speed Control: Compatible with selected motor AA Batteries: Eight for transmitter Motor: Tamiya Super Stock BZ (TAMC1430) recommended, Tamiya 540J and Sport-Tuned motors cannot be used Battery: NiCd or NiMH 6-cell stick with standard connector Battery Charger: Peak type recommended Tires: Front TAMC2547, Rear, TAMC2548 Pinion Gear: 20-25 tooth, 48 pitch Building and track equipment Vehicle; Specs such as finished size not provided by manufacturer Body; Length: 11.5" (292mm) Width: 5.7" (145mm) at widest point Height: 2.1" (54mm) For Replacement Ball Bearings use: Qty. Size Location Qty Bearing Set 2 5x10mm Idler Gear 1 DTXC1535 2 5x8mm Diff Gear 1 DTXC1523 2 10x15mm Diff Joint 1 DTXC1595 1 4x8mm Counter Gear 1 DTXC1511 2 3x7mm Steering Linkage 1 DTXC1506 2 5x10mm Rear Hubs 1 DTXC1535 2 5x10mm Front Hubs 1 DTXC1535 jxs 07/12/10 ir/jxs