MTRs are basically mounted one way on the rim...haven't seen them rotated backwards on the rim like those would do with MT tires....I've rotated my last KM2 set due to the rounding of the outer edges. Wheeled another year. Then sold set of 4 for cost of 2.5 new.
I've been running 35-12.5-15 KM2s for years. I'm on my second set. My TJ was a driver, wheeler, driver, but getting old myself, I prefer to arrive wide awake and wheel. So I use a trailer.
With my type of Midwest wheeling, I've only experience 1 sidewall slice (6" long) from a cut root. I've experience 1 puncture (2 Locus tree needles which took 3 plugs in the sidewall and held for 3 more years!). I've been known to wheel on my sidewalls and rims too.
2 vids on V-notch over various years...
http://youtu.be/XD6Q-tBnhgkhttp://youtu.be/iHq_GhfRwNAYah, my rim's outer edge is no longer perfectly completely 'round'.