another will this setup work (i know i know)
 

ok guys heres my problem id like to go with swift springs with 15mm spacers up front and 20mm in the rear BUT the previous owner of my car swapped out the stock rubber for some 275/30s up front and 305/30s in the rear! car has the 19" rays just wondering if anyone is running this setup and if they are rubbing any? thanks in advance!

I know 20mm with 305s on Nismo rear wheels will rub. Fronts are gonna be cutting it close too, it might rub unless you dial some neg camber. Don't take my word for it though, lets see what others have to say.

Im doubting the 275s up front with a 15mm spacer will fit without rubbing.
The 305s in the rear may be cutting it close on a 20mm

No concrete evidence here though, just going based off of what my car looks like with 15F/20R specers, stock tire width, and swift springs.

unless the ride completely sucks (tramlining and all) i would just drive them until they wear out and get the factory sizes before doing the spacers.

i may just do that thanks for the help guys! anyone know if i will have rubbing issues without the spacers just lowered on swifts? thanks in advance