What is the weight carrying capacity of the F-150 rack?
Prinsu does not have official weight ratings for their racks, but it will carry a roof top tent and additional gear, for example.
Does it have the capacity once installed to be able to mount a tent?
Yes, Prinsu racks are built to hold roof top tents.
Will this work on my 2012 f150 supercrew xlt?
It's only been test for model years 2015-2020 - 13th gen