I got 315/70 R17's same as stock. At this point I am way more than impressed. The road noise and vibration compared to the stock BFG's is...well, there is no comparison. These tires are great on the road, very quiet and very smooth. I took them offroad in light sand this weekend and had no issues either. My wife and I cruised down some trails while cutting firewood and only had to put it in 4X4 high once while making a turn in deep loose sand at a trail intersection. Other than that, I had zero issues making my way through loose, sandy trails with a bed full of red oak. They are heavy...78 lbs. per tire, but I'm only concerned about that kind of weight in my Cobra and Mustang drag strip car!!! So far, great tire, great price!