garyemunson wrote:
Are individual flaps mounted behind the duals liable to get flipped over the tires? Is that more likely if the flap is too long (too close to the ground)?
The stiffness of the flaps and the normal air flow while underway is usually more than enough to keep the flaps from flipping over the tires. About the only time I've seen flipped up flaps on buses or trucks was after a tire blow out where the flap was the least of the concerns. A low hanging flap would tend to get dragged away from the tires, not towards them.