I've had the KM2 for 4 years now, in 35x12.50x15 on a 15x10 & 15x8 wheel.
I've them aired down to as low as 16 psi offroad, and pumped as nigh as 38 psi for street.
I totally agree with RedneckKid with every part. However, to give the KM2's a fair review, they are not "mall crawlers."
In Texas, we get everything except deep snow.
Soft sand: Horrible. We see people get stuck on Texas beaches all the time. There's also Texas Off Road Ranch, which is notorious for loose sand or silt. You air down, be easy on the gas, and don't fight uphill situations. The KM2's left me stranded.
Packed sand: Good. Works well, just as any street tire can "perform."
Mud/Wet Fields: Terrible. I've gotten stuck a few times, and it's incredible stressful. Situations where locked 4WD should be enough, it wasn't. As previously stated, the don't clean, and you're left with a slick, smooth, rotating mass of clodding mud. I've tried to spin them out, but it's no good.
Water/creeks: Not good. This is also loose terrain, and you should have other tires if you do anything like this. I've had to use lots of speed to get through these obstacles. Not always a safe alternative.
Street: Excellent. It's a really good tire that stops predictably. They have good grip, and I turn corners faster than I probably should because I feel confident with these tires. They are not a heavy tire, and are very durable as a radial tire. After 40,000 miles, they are still going strong. They are getting "noisy", but only because my wife tells me. I don't notice it since it's also a DD. It's a comfortable ride as well. I currently have 1 nail and 1 wood piece embedded in my tread, and it still holds air. LOL I should get it patched.
Trails/dry dirt/fields: Good, as expected. I've consistently been happy and have not been left stranded in situations like this.
Light snow/wet pavement: Adequate. I've experienced some sliding about a month ago when we had freezing rain, sleet, and light snow, and my tail got "happy" a little bit. It's a lifted truck, so rear traction was an issue.
Rocks: Great. They grab very well on rocks and escarpments. Good traction, goes where I want. In a couple instances, I wish I had a more aggressive tire, but I change my line and I'm good. I also have to drive back home, so there's gotta be a compromise.
Final input: Why have I had them for so long? I guess because they were so cheap to me when I got them new, new wheels & tires are expensive, they are excellent on the street and getting to trails & rocks, they're durable, and they look great.
Someone commented that they are like BFG A/T. No, they're better than just that trail/street tire.