Found this
modified Hummer at Popular Science.
This is a 2008 model and the article says;
In case fuel consumption on your Hummer wasn’t spiting Prius drivers everywhere enough, engineers have pooled their talents to add aftermarket tracked belts in place of the “nothing wrong with ’em” wheels.
I wonder if the engineers thought it was a new idea. Hope not
Around 1958, this strange looking vehicle conversion was launched by James A Cuthbertson & Sons, of Biggar, in Scotland. It was designed to go further in adverse off-road conditions than the conventional Land Rover.
A standard Series II long wheelbase Land Rover minus its wheels was dropped onto a sub-frame, and a track fixed around bogeys at each corner with a sprocket that replaces the Land Rover’s road wheels.
The front tracks are steerable in the conventional way, the tracks turn as a whole for steering – aided by substantial power steering driven from the engine crankshaft pulley.
Not to mention it would have been a lot of fun to drive.
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