Originally Posted by wstar

My 18x10 square setup on the 370 is +34, and I use a 10mm spacer on the back just to make it look a little better with the 370's fender flares. Given 1 inch is 25.4mm, that should be equivalent to about +9 on 18x9's? So it sounds like your 18x9+15 setup (or 18x10 equivalent) is splitting the difference to avoid worrying about a rear spacer, which sounds totally doable on the 370.

I know these are for SpecZ 350's, but you might sell more if they work for the 370's here too. Sounds to me like they probably will.