Rear Rock Guards...An Interesting Observance Today

I agree with your observation. And I got tired of bashing my rockguard on the ground and having to remount it -- till I realized I was better off without it.

Not only that ,the way they mounted Ours to the Fiberglas resulted in tearing it Half off!

That's a very interesting observation. I'll have to watch next time I'm driving in the rain.
I wonder if anyone has a 'scientific' explanation why this happens?

I am a RV technician and Master Certified. I have had scores of my customers relate their experiances. I have had 2 customers that purchased from CW. They each purchased the standard hard rubber first and had problems with debris on the tow car. They each got CW to exchange for a broom type and had the same problem. They then got their money back and purchased the specific Rock guard that mounts ON the Tow bar. THAT solved their problem. From what I have observed in the past 25 years since people started putting them on---THEY ARE USELESS, BUT, BOY, DO THEY LOOK GREAT. AND they make me money when they get bent and torn off going over curbs and such. Next time you look at a Rock Guard, Notice how many open areas there are at the top and how far it sticks from the ground (most due to air suspensions on Diesels). They are installed by both the OEM and the aftermarket because people wanted them, NOT because there has been research by OEM's or anyone on their effectiveness. Doug

I've watched these a lot. If the shield is mounted hanging just above the road it drags as you go over bumps, etc., and kicks up rocks and muck. Just look at the beat-up bottom for proof.
If it hangs too high the whirling draft created behind it sucks road crud up also, something like wing-tip vortices on airplanes.
There may be a sweet spot, and it also depends where it is hanging in relation to the back of the coach. All too complex. Bye-bye!

we have the brush type,does;t keep dirt off but in 6yrs only a coupleof rock chips.ours has a steel bumper so its mounted fairly high.it works better than I expected ken

I just pulled mine but haven't come to a conclusion yet. I know with it I'm getting sand and crud up on the plastic below the windshield and we've been through two rain storms so far and no sand. Now the side radiator and dust is another situation... whew, what a quick mess that can make.

Yep plain old truck type mud flaps work the best.

We had a Newmar Essex that had a full span guard and it threw all kinds of stuff onto the toad. One day traveling down I-81 it fell off. Our toad was much happier after that. The only thing they are good for is advertising for the MH manufacturer.

I do not yet have it re-installed by my "Rock Guard" is a Blue Ox RV underskirt (They have a new name for it now)

This is a fabric mesh that streatches between the motor home and the towed, it makes sure that which is BELOW the hitch, Stays BELOW the hitch.