LEGO Mindstorms — RC tractor with 3 speed gearbox

е:

This is a cool tractor with extra big selfmade tires.

credits:
«The Lift» Kevin MacLeod (incompetech.com)Licensed under Creative Commons: By Attribution 3.0 License mons.org/licenses/by/3.0/ Источник видео youtube.com/watch?v=Zs7esJuJ8wU