Detailed Description  Length: 428mm Width: 321mm Heigth: 150mm Wheelbase: 305mm Front Tire Size:φ100*40mm Black Tire Size:φ100*50mm 1)4WD Drive System.  2)540 motor-driven,Can be upgrated to brushless motor and ESC.  3)Waterproof dustproof sealed gearbox. 4)7.2V battery evenly distributed on both sides. 5)Fast easy assembly and disassembly receiver and battery cover. 6)Quality differential with four bevel gear.  7)Precise sealed ball bearing for the whole model. 8)Aluminum alloy driveshaft.