Going Big Bolt Pattern Wheels

Very nice. Question though. Why choose 15x7 for 255/60R15? I run that size tire on the rear of my Duster on 15x8s and those seem to be a really nice combo for handling by keeping the sidewall a little straighter and the tread a little flatter at higher psi (32 psi).
Yes 15x8 a little better for 255 tire. The 15x7 with 4.5 backspace were in stock and will work so ordered them. Doctor Diff recommended either 15x7 with 4.5 backspace or 15x8 with 5 inch backspace. 15x8 with 5 inch backspace is a special order wheel with 4-6 week wait while the 15x7 was a regularly stocked wheel. So went 15x7.