Nockawa

Don't forget both the front and back wheels are turning (I don't know if we can see it's twice better, but it is!). I didn't upload the video with the car driving on the floor but it's quite good.

Ok, I hope you don't mind Denny, but I tried to build something on my own, based on your first work, but with XL motors. You can see two videos: I'm sorry but the first video is all upside down, damn iPhone! :D

I understand that, but we don't have the right motors anyway, so why not taking the best available one ?

Denny, why did you try with an XL motor to get better speed/torque?

Could you invert all the gears ? The torque won't be good, but I'm curious of the total speed/torque.