The Waveshare 24417 plastic 4WD Robot Mobile Platform Chassis Kit provides you with a high quality DIY shell on which you can put your power supply, microcontroller or microcomputer, motor controller, sensors, etc.
This is a black Rubber Tire with a diameter of 40mm.
This is a black Rubber Tire with a diameter of 48mm.
This is a black Rubber Tire with a diameter of 80mm.
This is a black Rubber Tire with a diameter of 100mm.