I've got some of the Firestone T-831's on my truck. Unloaded, it went threw places at the GA Rally this year that people struggled on NDT's and Goodyear G177's in 6X6 and my truck eased through in 6X4. I hate reading that they are discontinued but mine have a lot of tread left on them so they should last almost the life of the truck. I like the look of the G177 but it's more of a highway tread pattern. The T-831's have a much more open tread pattern. NDT's are pretty good on the highway but when it gets muddy, not so much. My truck and I are good with the tire choice and if you can find some Firestones, they are worth it. I'll add some pictures of them tomorrow.