x2 on looking for 265/70/17. There are a ton of them out there, especially take offs with maybe a few hundred miles on them to be had for under $200. Mount and balance from a local mechanic shouldn't be more than 10 a tire, you got a new set for under 250 for certain. Don't mess with 30% tread, you will be swapping them out too quickly, especially if you have wet weather. The BFG AT KO's are terrible in wet once the tread starts to get low.