FJ wheels and New UCA's

Looking for a little help, I have seen it posted some but I just wanted to confirm. The FJ wheels have 4.5 in backspacing as opposed to the 5 in on the standard TRD wheel for my 2011. Sooooo, that means I can get Camburg UCA's for my truck if I switch wheels(they state you need 4.5 in of backspacing and it gives you extra clearance for tires), and possibly fit 285/75/16's with minimal issues? Thnaks for any help.

 

I'm running camburg UCAs(ball type fitting) with fj wheels. I have smaller tires though. 265/75/16 toyo open country mud tires. No problems and very slight rubbing. I made no alterations

With the bigger tire you will experience more rubbing. Nothing a little trimming can't fix.