They are called wheels or more, technically, correctly, they are called road wheels. These are the ones you see inside the "caterpillar" tracks. Their job is to support the weight of the vehicle.
The propulsion is generally created from the rear of the tracks via the drive sprocket (this is usually mounted above the line of road wheels slightly rearward). Some call this sprocket a drive wheel, but I believe this is incorrect as the device is more akin to a gear than a wheel. For instance it could not provide propulsion on it's own due to location and shape.
The track under the road wheels is pulled by the drive sprocket which then puts slack track on the return idlers above of the drive wheels, or directly on top of the road wheels to then be used to roll back under the road wheels.
The "caterpillar" tracks are used mainly to spread the weight of the vehicle as well the traction across the ground it is passing
Called a "half track."
Twenty wheels connectd to the tracks.
the back of the tank is even with the rear wheels, the main portion is between rear wheels and back doors.
Usually the back wheels are the ones connected to the engine, providing the power to rotate the tracks, and these are the drive wheels. The rest are bogey wheels.
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During WWII the "train" looking wheels were called bogie wheels. During the Vietnam War no US tank had bogies; all US tanks (as well as the NVA enemy tanks) had ROAD WHEELS.Generally speaking, a modern tank uses a layout consisting of 3 or 4 different wheel types.The drive sprocket (or drive wheel) is either in the upper rear or upper front corner, and is attached to the engine. It provides power to the track.The idler (or tension wheel) is in the opposition position as the drive sprocket (i.e. either the upper rear or upper front position)Road wheels are the large main wheels on the ground side of the track, and usually number between 5 and 8, depending on the size of the wheels and the length of the tank. These wheels bear the weight of the tank.Return rollers are much smaller wheels (maybe 15% or less of the diameter of the road wheels) aligned along the top edge of the track, numbering usually 2-4. They keep the track from sliding around, enabling better "track dynamics", which improve performance. Return rollers are not present on all tank designs (particularly, older designs sometimes eschewed them), but seem to be pretty universal in today's tanks.
racing is a sport on wheels
Fear of wheels also known as scared of wheels, frightened of wheels and wheeler discomfort.
Widening the track. Also called spacing the wheels.
Drive wheels.
Cage, or I called my tank simply a tank.
Frank Nasworthy's company was called Cadillac Wheels, which later became Cadillac Wheels of California. He is credited with inventing polyurethane skateboard wheels in the 1970s.