Who painted your flares? Did the dealer do it or did you have a local shop install+paint?Kryptik actually has the widest, at 18x11F/18x12R. Tigermack and I are tied for widest tire, at 285/30/18. All of us run fender flares.
I suspect the gen 3 can fit 18x10 under pulled fenders but otherwise 9.5 is the accepted max.