Called the DTV Shredder, here's something that can take the place of your motorcycle, ATV, and snowmobile. It can be used in all types of terrain and weather conditions, including snow, mud, rocks, etc. There is one thing, however -- it does not look like it would be altogether friendly on the environment. It does look like fun, though. More information here.
You could improvise and put one on but don't know if it would make it off balance. Will you be doing wheelies?