Crossbars

If someone has factory crossbars installed, could you measure the dimension, front to back? Or if you don't have crossbars, could you measure the outter-most plugged holes for the crossbars? That should be close enough. With my Santa Fe, I had to pry the cargo box clamps around the bars because they were so far apart. My cargo box's clamps max reach is 38.5".

Thank you