It was by no means a scientific measurement. But 3 of the tires on my ZJ were worn out Maxxis Buckshot Mudders, the KM2's were definitely taller than them. The other one that I really compared the clearance to was the "new" Wild Country tire, both the tech and I were concerned the KM2's were going to rub at ride height. Thankfully they didn't, and it allowed me to clearance them at home with a BFH and a sawzall, but it was dang close.
I read alot of reviews on them, and they seemed to offer the best combination of mileage/performance/price. Hopefully they'll last, otherwise my old lady will have a fit if they're shot before I get back from deployment again in '13, hopefully it's tons and 37's after the next foray.