Multi-Functional 4WD Robot Car Chassis Kit – Kuongshun Electronic Shop
Amazon.com: Professional Metal 4wd Smart Robot Car Chassis Kit, Robotic Cars C101 Platform Model with 4pcs TT Encoder DC Motor & Wheels for Arduino/Raspberry Pi Project, DIY Maker Steam Educational Teaching Kit :
Rosbot Plus Robot Car for ROS Educators and Developers – Oz Robotics
Dagu 4WD Thumper Mobile Platform
4WD Robot Car Chassis Kit Maximum Load 15KG – Oz Robotics
Keyestudio 4wd Multi Bt Robot Car Kit Upgraded V2.0 W/led Display For Arduino Robot Stem Edu /programming Robot Car/diy Kit - Integrated Circuits - AliExpress