From reading the reviews they are both good tyres. Is price a factor at all? i remember when i was looking for tyres the KM2s were always more expensive sometimes stupidly more expensive then another tread i was looking at.

KL71's are directional too arent they???

km2 are good man, i got em.
check out tirerack.com and import a set for cheaper than local, thats what i did.

Not always the case. I just bought a set(5) KM2's and it worked out to be $20 cheaper to get them here.

Have to consider fitting and balancing costs, if buying on line, too.
Most tyre places fit and balance in the price

Prices or currency has,change since I bought from Tirerack, I saved a few hundred.
I looked around in aus this time and got my 30's for cheap

White writing goes on the inside end of story.

White writing goes on the outside end of story.

Not seem the Kl 71's in action

Actually you have - they were on Brendan's car on the recent Andersons/Robertsons trip.

Those were pretty worn, but they didn't seem to be working at all.

Steve.

I don't think the hardness was the problem. Tread compound is irrelevant in mud. I agree the tread wear might well have been a big issue, but I don't know that the tread on the KL71's is that deep even when new?

I'll add that the KM2's we saw were also A) Brand spankingly new and B) In the perfect Sierra size (33X10.5)

Most new tyres, if available in that size, would work very well in a sierra.

Those 33 10.5's are very close in size to my old 9/34 swampers.

Steve.

White writing goes on the outside end of story.