Originally Posted by ahultin

Hi @Beachgrad, I would agree with @FBinNY. This looks very similar to the location my fuji frame broker in 2012. It is possible the frame cracked (I rode mine @60 miles with the crack thinking I was having a wheel issue then a hub issue) which then eventually allowed the derailleur to go into the wheel due to its new found freedom. Since you have a relationship with the trek dealer, have you tried to take it to trek to see if they could get it covered?