Heavy-duty trucks (also known as 4x4 trucks) typically refer to vehicles with 3 or more axles, though the exact number varies depending on the model and intended use. Here are some common classifications:
3-axle heavy-duty trucks
Mainly used for medium- to long-distance transport or heavy cargo transport, commonly found in road freight.
Example: 6×4 drive configuration (3 axles, rear two axles driven).
4-axle heavy-duty trucks
Suitable for transporting extremely heavy cargo or for special purposes (such as oversized cargo transport, engineering vehicles).
Example: 8×4 drive configuration (4 axles, rear three axles driven).
5-axle and above heavy-duty trucks
Mostly special-purpose vehicles, such as large engineering machinery transport vehicles or extra-long trailers.
