Originally Posted by DaveK
While we're speculating on the cause (mine was cracked too - replaced it last fall), I would guess that the most likely cause is slamming the trunk lid. Considering how many have cracked, I find it hard to believe all of those owners have driven it fast enough to produce the kind of downforce necessary to produce the problem, and I would think one hard trunk lid slam would produce a tremendous amount of force on those wing struts, considering the amount of overhang of the wing from the mounting points.
I know I've been very gentle when closing the trunk lid since I've replaced the wing! I would recommend others do the same...
Just my $.02 worth...
This has been suggested before in another thread on this subject. I will re-itterate what I have said before. In my case, I do not use my trunk. It is a weekend driver, and the couple of occasions that I have opened the trunk, it was closed gently. I have never used the car for shopping, long trips, or anything that would require storing anything in the trunk. I think the only thing that has ever been in my trunk was a racing helmet.
While this seems like a logical reason for the cracking, I can assure you that is not the cause in my case. I really believe that it is a design flaw in the roadster wings.