I just got the 265 terra grapplers a couple of months ago. I can't comment on the 265 versus 285 since I've never had 285's on. I went from stock size to the 265's. I can tell they are a bit taller (keep in mind the 275's were pretty bald, so I probably gained an 1" to 1 1/4") and narrower by just looking at them. With the narrower tire, I do notice it's a bit squirlier on the highway. And versus the stock tire (which had no hum), these do have a noticeable hum. I have noticed no change in mileage.
I like the look, but honestly for what I do I probably did not need an all terrain, probably would look at an all seaon next time. Having said that, there's nothing wrong with the tire, and did I say they look good
. Hope this helps.
Rookie2