i have a 1993 j30 that i want to get a new set of rims for. i need to know what is the biggest diameter i could go without the rims rubbing on turns or bumps.I also need to know the specs on the lug pattern in mm.do i need special rims because of rear wheel drive?

mine are 235/35/20s and they dont scrub ever and its 5x114 is the offset