I am big fan of these tires and of TireRack. The info provided on the website is invaluable - really helped me choose not only the correct tire (specs and ratings) but also the best tire for me. I had previously bought a set of 235/70R15 Yokohamas ATs for my 98 std cab 2wd Ranger (love those too!), and now these 245 SAT Khumos are doing great on my 99 ext cab 4wd Ranger. I wanted to get the correct size and duty rating tire for each of these trucks because I specifically did not want a heavy, over-sized, and unresponsive tire that would hve a negative impact on mileage. Being able to research specs and compare other user's experience, at my convenience, was invaluable to me.
So far both my Khumo and Yokohama sets are doing stellar. No problems what-so-ever. I don't do any off-road muddin', though, but I think my son did once and he came back in one piece. I would not hesitate to take these tires anywhere they are intended (hence, All-Terrain). They are a quality, competent, very respectable tire. And I am huge fan of Michelin tires. I run them on my 2000 Dodge Caravan, and Michelins LTXs are what I replaced on my trucks.
After speaking with my Customer Service Rep Rudy, he told me the Khumos are probably 75%-80% of what Michelin a tire is. I too was a little concerned with how Khumo tires would hold-up and perform. But I decided I would take 75%-80% of Michelin for probably 60% of the cost of Michelin. I haven't regretted it for a moment. Besides, as far as I'm concerned, these Khumos and Yokohamas seem closer to 90% of Michelins. Don't get me wrong, I love the Michelin Harmony tires I have on my Caravan - best tire I've ever driven on - in rain or on curvy mountain highways along side semi-trucks.
I saved a good bit of dough with these tires, and I couldn't be happier with their performce.