R50 QX4 / Pathfinder Tire Carrier Installation 

So the roof rack was kind of custom made. I dont have it anymore because it could only hold so much weight, but it was a cabelas roof basket roof rack, but I cut the basket part off. So it it was just a flat platform. If you go to the pathfinder forums you can search “rola roof rack” and it will show you how to mount it and make it low profile. When I had that roof rack on there, i put a solar shower on it and an awning.

I did not. The are just riveted into the sheet metal. Check my description for the post I followed. It is a good forum post.

I was worried about that as well. I installed it without any support last year but its holding well after many overlanding trips

Junkyard is your best bet. Join the R50 facebook group and ask around. You never know what people have. Also check facebook marketplace for people parting out pathfinders with tire carriers.