A Lego Monotread Vehicle 

Maybe have a curve on each tread, the tilt to steer?

It is possible with two motors it only needs to have two motor, so it one motor can go forwards and the other can go backwards

Some of the earliest "tanks" had an extra extending wheel which was intended to steer the machine. That would would

Kettenkrad?

​@@jordyvt08 the kettenkrad's front wheel actually doesn't do much for steering. There's a brake system connected to the handlebars so that as they tilt to one side, the brakes for the track on that side are gradually applied, allowing it to steer.

Good idea, I'll definitely note it down. Thanks!

@@in1 that would be awesome, because i am kinda stuck with my build rn

Then the easiest solution could simply be a worm gear sliding on an axle, or 2 beams with gears connected so the distance between in and out can change

@@in1 so the first one isnt rly an option bc i dont have that much worm gears und das zweite kapier ich nicht

Yeah I guess