Quote Originally Posted by wilbur View Post
Mainly for gas mileage. it keeps the air from gettin under the trailer where there is a lot of stuff underneath to cause a turbulance. It helps the trailer flow through clean air. Less Drag. Just like the fender skirts and air dams on a Nascar.
X2 and they are junk. First tire tread on big road debrie you hit. Dented,bent,tore off. Junk in my opion