Why is the six-wheeler called 6X6, the eight-wheeler called 8X8 and the ten-wheeler called 10X 10?

There are 4x2, 6x2, 6x4, 8x2, 8x4 and so on. Divided by two, the number in front represents the number of axes. Four is a two-axle car, six is a three-axle car, and eight is a four-axle car, regardless of the number of wheels. On the rear axle of a heavy truck, one axle can carry four wheels. The numbers behind represent suspension system and body suspension, which are related to the axle itself, commonly known as fixed axle and living axle, and have nothing to do with driving. This "4x2", "6x6", "6x4" and "8x8" have nothing to do with "two-wheel drive and four-wheel drive". These numbers stand for "[Chassis Shaft Configuration]". This term applies to all wheeled vehicles and can be simplified as "[chassis configuration]" or "axle configuration". Anyway, in a word, this value marks the "bump range" and "ride comfort" of the car body. The following numbers are even numbers: driving on a flat place-the smaller the number, the better, and the minimum is 2 (live axle or drive axle assembly). [To correct it here, it turns out that the direction wheel is written in brackets, which is wrong. The correct one should be the driving wheel. There is a universal shaft in the middle of the driving axle, which is also commonly known as the living shaft. The driving shaft drives the left and right axle shafts, which are divided into front drive and rear drive] to drive in the pit-the larger the value, the better, and the maximum value is the same as the previous one. For military vehicles, of course, the larger the number, the better. One thing to add: two-axis drive ≠ four-wheel drive, such as the military "8x8" may be a fixed full-axis drive, a fixed rear axle+front axle optional drive, a fixed rear axle drive and so on. [To add here, the two-axis drive is 4x4, the four-wheel drive is 4x4WD, and 4x4WD is also two live shafts. In most cases, 4x4WD has more living axes than 4x2, but it cannot be bent, but it is also divided into two halves. 4x2 is 1 living axis, and 2 stands for 1 living axis]. The left, right, up and down are alive, and even an ordinary four-wheel drive can't be done. The rear wheel of that car is dead, and at most four wheels turn together. The so-called "4x4WD" is a complete lie, that is, "four wheels ++4WD" is not "4x4" at all. Once the number behind is greater than "2", it means that there are a pair of wheels similar to "steering wheel", which is extremely difficult to control, especially "high-speed driving". In the world, only large trucks with more than three axles have this for ordinary vehicles, and the largest one is "6x4", which ensures a pair of dead axle wheels. Even so, in China, the driver's license is special, and it can only be opened with a "big notebook", and the largest one is "6x4". There are no "4x4", "6x6" and "8x8" vehicles for ordinary civilian vehicles in the world. The "6x4" truck is designed to ensure the overall stability under heavy load. Most of the extra live axles are equipped with "four wheels" and the distance is very close. In order to bear the load, the friction force is also increased to prevent the tire from swaying, which is beneficial to the steering wheel to control the direction. [The original statement may be ambiguous. To correct this problem, some [6x6] trucks can switch the transmission shaft between the front axle and the rear axle. Generally speaking, the rear axle is the transmission shaft, so the rear axle is close and can contain each other. The statement of "similar to the steering wheel" is purely metaphorical, but the steering wheel of ordinary vehicles is "dead axle". Since the steering wheel is generally a front axle, the axle of the steering wheel in front of the vehicle may be a living axle. This is a modified car. Americans use these loopholes to make money. They checked the law and found that ordinary driver's license is allowed to drive a three-axle truck, but "6x6" is not prohibited. In fact, all three-axle trucks are "6x4" at most.