http://www.mattracks.com/
These seem to be awesome... If you watch some of the videos, You'll be amazed at what they can pull a vehicle through. It seems to me that these should be put to use more than they are... So I ask you this:
Why aren't these more main-stream?
In any case, these are neat and I thought I'd show you... Maybe we'll see some mini versions in the future of FIRST
Videos:
Intro
Mud
Rocks
Swamp
Snow