I hit a pothole on a bridge today which caused my stay-mounted blinky light to drop down and rotate inwards, where it was caught between the left seat stay and spokes and spun forwards. This is my recreation based on the damage - at the time I thought it was just a broken spoke from the sproingy sound. I have trued the wheel but I found some damage on the inside of the stay.
I attached a few photos of the inside of the stay where the damage occurred. The vertical marks seem to just be surface scratches - the horizontal mark is actually where the surface material is separated. It is less than 180 degrees around the stay - there are no marks on the outside. Not understanding a lot about how CF materials are built, I'm not sure if this is merely cosmetic, or structural. I'm taking it to the Trek dealer tomorrow but I'd like some unbiased opinions of how serious or minor this might be. I have a charity ride this weekend that I hope I can ride in with this bike.
