We have a 6200lb pro street truck and we use the sts all terrains but I think the best tires are the bfg all terrains. A lot of the Pro stock trucks run them and do great. We are limited on tire size that we can run. I think the thorn birds would get to much bite. We had bfg mts and they hurt more than helped us but alot of guys run a mud tire . Another thing to think about is the more bite you get the more parts you seem to break.