What does the number of vehicle axles refer to?

[Jordan]

Vehicle axle number refers to the number of axles equipped with tires under the vehicle. For example, trucks may have single rear axle, double rear axle, or triple rear axle configurations, while the front axle is usually a single axle. Here is a partial introduction to vehicle axles: 1. In automobiles, the axle (also called beam axle) is connected to the frame (or monocoque body) through the suspension system, with wheels installed at both ends. The suspension system, not the axle itself, transmits forces and moments between the frame and wheels. The primary function of the axle is to bear the vehicle's load and maintain normal road operation. 2. Common passenger cars and vans typically have two axles - one front axle for the two front wheels and one rear axle for the two rear wheels.