Those tracks are VERY cool, PC! They covered them on "Tactical to Practical" on the History Channel a few weeks ago. Had a Powerstroke equipped with them running like a scalded ape over dunes and even on the highway. Good news is that they are a direct bolt-on for nearly any 4wd truck, bad news is that they are about $7K
They have a bunch of these things running around McMurdo station here on Antarctica. The problem with them is they do not like to turn well. If you take a sharp turn at any kind of speed, you will roll the track off.
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