Stone Flaps

Largely pure myth.When a 4wd is travelling at 80 k/ph or more, whether the air flows straight towards the rear or deflects and goes sideways will make no difference to airflow past the diff.

If you are towing, forget the myth and fit a stone stomper and be done with it. 100% better than any flap..

I beg to differ with the previous reply about airflow, but good advice re stone stomper. We do not have one, but many reports put them way in front of other methods. Just need to have caravan or trailer well protected underneath as stones can be taken further back.

You will also create drag with a full one piece mud flap. Make two single flaps. Nothing gained by having it full way across either. Two version here

Had a set of Rock Tamers and they scared the crap out of me on a trip up the Birdsville Track.
Didn't matter how I adjusted the angles, the stones were observed in the side mirrors being ejected backwards and sideways, potentially into the path of other traffic. Obviously I sold them.

Now own and use a Stone Stomper and have been on a myriad of trips without any problems at all. Chalk and cheese!

Hi Sand Man, I totally agree with your comments re Rock Tamers. Sold mine and bought Rock Tamers.

Cheers
Jon

Used to be some info on this on the PradoPoint forums.

Reality info from owners who suffered overheating problems.

I know someone with a Prado 120 who used a full width mud flap for years without problems, did the Canning Anne Beadell etc with it fitted and no issues.

The problem I see with any mud flaps required to stop stones is they need to be very close to the ground, this can result in the mud flaps themselves flicking up stones and actually making things worse.

Personally I use a Stone Stomper on my Prado and find it excellent, the only down side I have had with it was on the last trip with inclement weather resulting in a mud bath and due to the conditions not wanting to stop to remove the stone stomper so ended up sacrificing the mating under the circumstances.

Still can't speak highly enough of Kristian at stone stomper, he went above and beyond the call of duty to get a replacement mat shipped to me at Darwin and at a discounted price to boot.

I made my own. Very similar to Mother Hen's but a bit longer. I also angled mine in an attempt to guide the stones down AND outwards. There is still about a 400mm gap in the middle for air to pass through.