1. What are those big long sheets of plastic that hang down below the trailer on the sides for?


  2. They help driving in the wind..everslight fuel mileage increase…and helps keep the wind from “lifting your tandems” off the ground when lightly loaded.JMO


  3. I think they are aerodynamic aids that state of CA mandates on trailers. Also, fuel is the 1st or 2nd largest expense of any trucking company, so they will usually try anything fir even a tiny reduction of fuel expense.


  4. They make the owner of the truck feel good.


  5. They are there to help blow the trailer sideways when the road is icy. lol


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