The tires you were asking about are a 31x11.5" Super Swamper LTB. They are on a 16.5" rim. I picked them up off of a friend who ran them on his jeep Cherokee. They are absolutely awesome off-road, and you pay for that whenever you take them on road. LOL. If you have never been on a swamper style tire before, i would suggest you go for a ride with someone who does first, they are loud and ride pretty rough. I use them for weekend-week wheeling, but i dont run them daily for this reason. Hope this helps.