I would think that you would have to be practically be doing cross country work to suffer a problem with the undertray catching a large stone and doing damage.
i.e. this wouldn't be a road that you would not typically be travelling on with a standard undertray anyway since it would be destroyed due to being 20mm lower. (I have destroyed a few in my time on my t-sparkand my GTA)
The plastic sump doesn't provide much impact protection, I don't think either are designed for that and you simply have to analyse if it is safe to drive on a rocky bumpy road that has protruding rocks.
..even without an undertray.
Cheers,
TB
Originally Posted by AussieNath
I've got the Zeatek item on my car and have been very happy with it. There was always one part of the road on the way to work that the car always bottomed out on and since I replaced the tray no more problems. It gives an extra 20mm clearance....not much, but it makes a massive difference practically.
I went through 2 trays before deciding what a ****e piece of gear the original tray was. A lot of us guys in Oz did a group buy (2 years ago) and none of us have had a problem. The chances of a stone bouncing up and causing damage would be less than winning lotto. I can't honestly see how it could do damage to the bumper?