The axle on your vehicle is the structural component that connects two wheels together on opposite sites. It’s a load-bearing assembly that acts like a central shaft, maintaining the position of the wheels relative to each other and to the vehicle body.
The construction of your axle is designed according to what your vehicle is built for; trucks and off-road vehicles are equipped with axles that keep the wheel positions steady under heavy stress (ideal for supporting heavy loads), while conventional axles are constructed for the needs of the general consumer.