I'd argue that there are limited compromises associated with running the KM2 over something like the A/T - they're very quiet and have good wet and dry bitumen grip for what they are.
Can be a pig to balance out though...
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I live in Stanwell Park and if you are a Sydney sider you'd appreciate the steep winding road that leads down from Stanwell Tops. The road is often wet days after rain has stopped falling. I have km2's in 255/85 and i can point and shoot my defender down the hill at 70 km/h taking corners with the same level of confidence i can in my wife's sedan. Wet road grip is not a shortcoming of the KM2. As for putting up with punishment while rock crawling, my rear tyre from the weekend. Been doing this for over 2 years to the poor things and no punctures or broken bead.
[ame=http://vimeo.com/79755650]Punishment taken by the BFG KM2 rock crawling on Vimeo[/ame]
my 2 cents: money well spent.
MLD
My advice - act quickly! Get the Muds before she changes her mind!
Tried to convince the Mrs that she needs a 90 as a nice city runaround but to no avail ...
I've had BFG AT's which are ok, but I'd prefere my KM2's a lot more. My current KM2's have a bit of saw toothing at 50K. I's say 2/3 warn from useful off road lug grip. 50% warn if you want to extract the most from the tyres and still be legal but non effective.
To me they seem a great all rounder. The ware well, handle wet roads well, and go great off road, and tuff as nails.
I have two tyres with cuts in the floor of the tread from wrong pressures on harsh gravel roads. These two also have rips in the lug base from bottoming out on an alloy tray. The lugs grabbed the trays ribs so something had to give but the tyres still keep going.
The other two have the odd small cuts, but no cracking or chipping.
For what it's worth, if I didn't go muds i'd buy the old Continental General Grabber. Boring to look to, but will do you proud with everything bar mud. Have a mate who goes just about every where I have, and gets 80K out of them easy.