255/70R16 vs 245/70R16

[USAF2W1]

We'll I was dead set on getting some 265/75R16's but I like to offroad too much and dont want to have to deal with rubbing.. So I'm gunna stay with a closer to stock size. I like the size(255/70/16) I have now except the fact that there is no selection for MT's in it.. but if i go with a narrower tire the sky is the limit.. What do ya'll think?

Can't change the title but i meant 255/70R16 vs 245/75R16