I mounted the bag like this because I could avoid pocketing the frame, I planned on running a smaller diameter tire anyway and because I only planned on laying frame/crossmember. I have a few other projects going so I wanted to keep this toyota simple. It gives me great lift as well. If I ran a larger rim/tire combo or sectioned the crossmember about 1.5" I would probably run into some issues and have to pocket the arm or move the bag.