My first question is whether the wheel is straight in the dropout. It is difficult to tell from the photo, but it looks like you actually have more space on the drive side at the hub, yet less at the seat stay-- it just looks crooked. I have several mtn bike wheels that I need to "adjust" with the QRs when I swap them. You should have plenty of adjustment, since I assume you have sliding dropouts on this thing. From the photo, it looks like the drive side is further back than the non-drive--- which supports the crooked theory.