MedixJK
-
Ive got 37s and kmc wheels w 4.5bs. Works and looks great but do get slight rub at full lock on my lower control arms.Unless I am mistaken the 8.5" and 9" widths in the 17" size have offsets of +10mm and -12mm, respectively. The 8.5" width will therefore have a backspacing of 4.89" while the 9.5" width will have 4.53".
I ran 35" Trail Grapplers on a wheel with 4.75" backspacing and added washers to my steering stops to keep them from rubbing the frame at full turn... 4.5" backspacing seems to be the safe bet for 35s. When I transitioned to 37s I also jumped to the ATX Slabs with 3.25" backspacing, so hopefully others with experience running 37s and 4.5" backspacing will chime in.
Add: they are 17x9