I had two sets of these tires on my service truck (Chevy 2500 HD) and they performed well. I drive gravel about 80% of the time and have a trailer weighing around 6K pounds on about 60% of the time. I thought they work extremely well considering I didn't always get them rotated as I should have. Ride noise was not noticeable even after they had some wear on them. Also, two co-workers tried them and love them, one of them is also on his second set. They clean out well when driving through mud or snow.

 

I cleaned the truck up a little, so here are some better pics

 

Just got a new pair. 275/60R20 is what I have which is right at a 33in overall diameter They ride great in my opinion. Haven't had them on very long so I can't say anything about wear or gas mileage. Depending on the gears you have will make a difference on MPG. If you google RPM calculator you can figure out pretty close to were you will run for RPM and make a good guess for fuel mileage on that basis. Hope this helps!

 

That's pretty much true for any oversize tire.

I've been enjoying these tires. I've put on 3,000 miles in about 20 days. I've been through snow, ice, mud, sand, grass, and a ton of rain. They have been nice and quite, they track straight, and overall seem to have great road manners.

 

I just got some hankook dynapro atm's on my 2004 fx4 275 /65R18

 

40k miles on my Hankooks.
They still have pretty good tread left but will be replaced before winter hits here again.
Overall they are pretty good,no real complaints.
Off road mud not the best but I dont expect a 55 series AT to be.
Dry off road traction excellent.
Little highway noise,but more than crap Pirrelli ATR .
I'm going with Toyo AT2s in the fall,upsizing a bit to 285/55s to get the Extremes.
There is nothing wrong with the Hankooks and I'd bet just as good as most mild AT tires.