What is the difference between a fender and a wheel arch?

[Sherri]

The difference between a fender and a wheel arch lies in their names, as they refer to the same component. The fender, also known as the wheel arch, is located on the outer body of the wheel. Its function is to reduce the drag coefficient based on fluid dynamics, making the vehicle more stable during driving. Depending on the installation position, it is divided into the front fender and the rear fender. The front fender is installed above the front wheel, which has a steering function, ensuring sufficient space for the front wheel's rotation. The fender designer uses the wheel travel diagram based on the selected tire model and size to verify the design dimensions of the fender. The rear fender does not have the issue of wheel rotation interference. For aerodynamic considerations, the rear fender is slightly arched and protrudes outward.