Can somebody with a Tuff Stuff RRT tell me

[Waters]

the maximum width of the crossbar mounts? Im building a rack for my trailer, the rails are at about 47", I dont know if the mounts go that far. The tent is still in the box and buried under a bunch of stuff in the garage so it would be a pain to look at, at the moment.

 

[achuto]

My rails are 30" apart and there's 12" of room outside of them. Outside measurement for crossbars on mine looks like 56"

 

[Waters]

Thank you achuto, appreciate the help.