Why are tank chassis tracked and infantry fighting vehicles wheeled?

Walking on a track is like laying an infinitely extended track for a tank, so that it can pass through various complicated road conditions smoothly, quickly and safely. Because of the large grounding area, the passing capacity of tanks on soft and muddy roads is increased and the sinking is reduced. Because there are patterns on the track board, pedals can be installed, so you can firmly grasp the ground on roads such as freezing rain, snow or uphill without slipping. Because the length of the track is 4 ~ 6m and the center of the inducer is relatively high, the ability to pass through trenches and vertical walls is strong. Generally, tanks can cross trenches 2 ~ 3m wide and vertical walls 1m high. The reptile also has a special function. When crossing the river, it will dive and walk at the bottom of the river. If the crawler is floating, it can generate propulsion like a propeller to drive the vehicle forward.

Tanks are relatively heavy. If crawler can reduce the pressure per unit area, the requirements on the road surface can be smaller. Moreover, the defense performance and off-road performance are better than those of wheeled vehicles, and the wheeled structure is simpler than that of tracked vehicles. Generally used in light armored vehicles, the highway speed is better than that of tracked vehicles. Maintenance is also much simpler than tracked vehicles. Tightening the track of that damn tank is a big deal.

Wheeled vehicles are mainly used to drive on flat roads, but there are no flat roads on the battlefield, only various road conditions. In order to face all kinds of road conditions, caterpillar vehicles are used. The advantage of this kind of vehicle is its strong grip, which can reduce the pressure of the tank on the road surface and prevent the tank from falling under the road surface. The heavy suspension system is superior to wheeled vehicles, which can make the tank run more smoothly in various road conditions. Because tires have high requirements for air pressure, sometimes they are easy to burst, which has a great impact on the battle. Tires and tracks are easy to get into muddy roads, but they won't get into them. Because its contact area with the ground is much larger than the contact area between the tire and the ground, it will not fall into the muddy road. So for tanks, crawler vehicles should be used instead of wheeled vehicles.