Hiwonder Large Metal 4WD Vehicle Chassis for Arduino/Raspberry Pi/ROS Robot with 8V Encoder Geared MotorProduct Description Hiwonder vehicle chassis is loaded with mecanum wheels and encoder geared motors for the better movement. The 4WD mecanum wheel car chassis features universal wheels, which can move in any direction and run perfectly in narrow spaces and on rough ground. All black outlook makes your robot different and stronger! Hiwonder vehicle chassis is loaded with mecanum wheels and encoder geared motors for the better movement. The 4WD mecanum