Re: Anyone running 325/65/18 tires?
I don't know for certain either, but it would be the same diameter pretty much as a 315/75/16 that a lot of folks have used, just a wee bit wider. Wheel offset may come in to play with the wider tire too.
My comparison likely isn't too relevant since my van is from the dinosaur era, but I recently went from 315/75R16's on 10" rims to 295/75R16's on 8" rims and was able to adjust my steering stops a bit (ie have a slightly tighter turning radius now.)
2009 Express AWD, CCV Top & 50-ish home build. Daily driver/camper/kid hauler