[QUOTE="jaymar, post: 13388549, member:
On factory 16x8 wheels with zero offset the 285/75-16 tire size (nominal 32.9" dia x 11.2" wide) is proven to be a fine fit that does not rub.
The new 8x16 wheels you're considering with -6 offset means you'll end up with less than 1/4" of additional outboard projection. Not much different.
I don't believe you'll have any issues. At the very worst, I suppose it's possible you could get some minor rubbing at full compression from a high-speed bottom-out where the axle travels straight up and into the bump stops. But, doubtful.
I ran for several years with factory zero offset rims and no lift with 315/75-16 tires (larger dia and more stick-out than 285's on -6 offset). These did rub the front fenders on full compression, but only when I was driving stupid fast and compressing hard on big rolling bumps. The noise was alarming, but no damage and no nuns were harmed.