Go offroad on a skateboard with the tank inspired vertrax electric skateboard. Designed by Bryson Lovett, the skateboard forgoes the traditional 4 wheeled setup for a single trank tread instead.
I’m not sure how stable this would actually be, it seems like you’d fall off sideways unless you carved the sidewalk up like snowboard on snow. Maybe there should be 2 tank treads like a tank has. We’ll never know since the creator build a non-working scale model (pictured) only.