I have a ATOC carrier in top of my Subaru Outback that I use to carry my tandem. The carrier is attached to the factory crossbars. In certain wind conditions, like when getting near semis the bike shimmys. I feel that there is plenty of strength in the setup but still can't relax and can't keep from looking through the moonroof to check on what's happening which isn't very safe either. Also this is the type of rack where you remove the front wheel.
Has anyone else experienced this? Is there a fix or should I just close the moonroof and not worry about it? ( hard to do)