Mud Flaps

December 10, 2012
Filed under RV Tech Q&A

My question is about flaps on the back of a motorhome to protect a towed dinghy vehicle. I have an 18-by-48-inch flap (a solid piece) on each side of the hitch tube bolted directly to the bumper. I have seen the loose brush or bristle flaps, 4-inch-wide strip flaps and solid one-piece flaps on motorhomes hanging by a chain a few inches below the chassis. Which of these systems are considered most effective? Does a solid piece from the bumper down create an airflow drag? The loose bristle or brush type seems to almost reach a horizontal position when the motorhome is at highway speeds. Thanks.
Thomas Kelly Jr. l Dallas, Texas

The nearly solid shields work best but create a huge wind drag that could affect your mileage. The brush or hula skirt types allow air to pass more easily, but when they lift from the wind passing under the coach they do lose some effectiveness. I prefer a soft “bra” and windshield cover on the towed vehicle, as these don’t increase wind drag as much. Roadmaster makes a front-end guard that attaches to its towbar assemblies, and it’s an effective piece of hardware, as well.
— Ken Freund

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2 Responses to “Mud Flaps”

  1. Phil Mayo on December 10th, 2012 1:58 pm

    Some months ago the was an artical in Motorhome Mag. about a product that could be used on the front of the Motorhome to clean off bugs and would not scratch the shield.


  2. Nina Rose on December 17th, 2012 9:03 pm

    We like the solid mud flap hanging from the chain. It allows an air flow to reduce the drag, but will not fly up behind as you move down the road due to the 65 pounds that it weights with the weight and backing plate.
    Since it does swing, if you find a road hazard, the mud flap can go up and over instead of being t-boned when it hits.
    More important is that you have mud flaps in the fenderwells just behind your tires. That stops the rocks before they can do any damage to the rest of your coach. They should be as close to 4″ off the ground when driving as possible to do the best job.


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