What are the classifications of cars into A, B, C, and D levels?

[McGenesis]

Classification is primarily determined by the wheelbase. Below is relevant information about car classifications into A, B, C, and D levels: 1. Definition of A, B, C, D: These classifications are based on parameters such as the car's external dimensions, interior space, wheelbase, and engine displacement, with the wheelbase being the most critical criterion. 2. Wheelbase: The wheelbase refers to the distance between the front axle, which connects the two front wheels, and the rear axle, which connects the two rear wheels. 3. Wheelbase is proportional to the car's level: Generally, the larger the wheelbase, the higher the car's classification, which also means more space and a better riding experience.