gbaglo
Senior Member
I think most of the trailers are not owned or attached to the semi in any permanent way. Owner/drivers wouldn't have any incentive to add the tabs to trailers they don't own and owners of the trailer aren't going to concern themselves with mileage.
That said, I think you'd have to own a wind-tunnel to figure out where to place them and if you were saving fuel.
That said, I think you'd have to own a wind-tunnel to figure out where to place them and if you were saving fuel.