I hear people either love or hate the KM2s. They are wearing good on my 4 door F250 but have a very slight bounce at around 42mph. I will likely run them again. 305/70/16 on factory wheels.
I had the KM2's on my D-Max. Went to the Toyo Open Country MT in a 35 - 12.50 - 17 E load range. Way happier with the Toyo. The most weight one needed to balance was .75 oz. They ride better, are quiter, and have zero vibration. Not to mention half the money of the BFG.
I second the Toyo or Nitto. I have a good buddy with an 06 crew cab D-max with 35-12.50-20 Nitto Trail Graps and they are wearing great. He's had them on over 2 yrs and still have good tread left. Unsure of mileage he has on them. I would personally go with the Toyos or Nittos over the KM2's.
Nittos look a lot better than the KM2s. I have them on my Dmx now. I'm not getting the mileage of the KM2s. Probably 35k vs 50k. They are pretty quiet for an aggressive tire though.
But I am liking my MTRs I got a few months ago, they are on the expensive side but the truck rides good and they are pretty quiet, do good in the rain too.
I bought some trail grapplers at about half tread and have put about 25,000 miles on them and they still have a good bit of life left! On a 1500 Chevy. I hated my KM2s more than any tire I've ever had...