The MX prototype shares much of its components with the street-oriented machine. BRD say its got the same 40 electric AC ponies (it recently measured 42 horsepower at the back wheel), the identical monocoque aluminum chassis and the likewise duplicate 5.2-kWh battery that’s said to be go for 50 miles of aggressive driving. What’s new are larger, but skinnier, knobby tires, off road-appropriate brakes, and suspension tweaks. In race trim, it’s a svelte 250 pounds of rooster-tailing madness and we can’t wait to see it tearing about in its natural element.