here it is. i need to know what would be better, in terms of being flush with the fender, without rubbing or even sticking out.

my rear is 19X9 with a 255 width on it. should my offset be +15 or +20. i measured it myself and cant decide. seems like the +20 is damn near close but just under the fender, while +15 might cause it to stick out a touch.

any help???