Re: 18" sahara rims on 08 grand cherokee?
All of the rubbing issues and spare tire fitment issues depends on the tire size on the wheels. You can use the stock JK 18s with stock WK 245/60/18s and they will fit w/o any issues or rubbing and in the spare location. But if you have the stock JK tires on them then its a different story i think those are 255/70/18.
2005 Dark Khaki (PJT) WK Limited 4.7L V8, '08 Overland Front End, Custom Exhaust, 245/70/17 GY Silent Armors, Bilstein 5100's and other mods.
My Wife's Jeep:2006 Jeep Liberty KJ 4x4 2.8L CRD