Tactical vehicles of combat cars are usually equipped with round tires with a special configuration to try off-road lane. But on different occasions some military cars that cross the extreme path will use triangle-shaped tires (tracks).
Round tires have been proven to be optimal for hard road surfaces, while triangular tires are optimal for smashing smoother road surfaces such as mud or snow. Well, if there's a car that needs to cross the terrain with these two types of road terrain, then the US Defense Advanced Research Projects Agency (DARPA) has a solution.

DARPA fits perfectly with the GXV-T program that wants more mobility capability to cover cars with tons of steel to support efficiency of vehicles.

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