on my second set of mud grapplers on my Powerwagon, put 30K on my 37's and the guy i sold them to is still running them and using them in tug-a-truck pulls, have 15K on my 33's and have over 50% and thats with tugs on them. My 37's did awesome off road. they went where boggers couldn't get to.
I have 295/70/17 trail grapplers on my 3500, have 5K on them and haven't noticed much wear to them. quite on the road too. Wouldn't get any other tire but a Nitto