Q50 Stock 17's
 

Anyone know what spacers I should run with these? 25MM? I just want them to be flush with no drop. I'm not sure of the stock off sets. Thank you!

According to this site they are 17x7.5 +45
https://www.wheel-size.com/size/infiniti/q50/2016/

To get the same fit as a 9.5 +40 (which is nice & flush IMO) you'd need a 30mm spacer.

I think a 25mm would be pretty good, give you a little extra room but still a nice fit at the fender.

Question so when I go 18's I should look for a 18*9.5 or 18*9+30? There is a other set I am looking at is 18*8.5+ 35? Square set up with 245/45/18's. Thanx man!

To be honest I'm not sure the exact fit on the Q50 sedan, what offset will get you the flush fender fit may be off a few mm vs. a G37 Sedan.

The 9.5 +30 would seem to be pretty aggressive, my 9.5 +38 is very flush, so that 9+30 would be about 2mm outside the fender from mine, and the 9.5 another 6mm out from that. The 18x8.5 +35 would be the easiest fit for sure :)

Cool thanx man, Thanx as always for the help!