I just put a new set of BFG AT's on and have some pictures to show (sadly i only had my crash camera not my good one) I ran my previous set for a little over 74000 KMs in 5 years, it's a little hard to make out since the camera is soooooooo bad but i still had a fair ways to go to hit the wear bars. That was just the first tire they took off not necessarily the best, the best i have on as a spare if anyone wants better pics of tread depth measurements.
The new one
The 74000+kms old one
two shots side by side
All and all I'm very happy with what I got
1998 GMC Safari AWD, BFGoodrich AllTerrain T/A
Jet performance tuner 91 octane preset, Jet under-drive pulleys
Rancho 999000 series shock, on-board controller to be installed later
DHC rock rails and skid plate Add-A-Leaf
G3500 front calipers
Zexel Torsen Diff
11" drums
180 amp Alternator
Long tru-cool 4590 trans cooler