Thought I'd revive this thread with some useful information:
I recently took a trip from Boston to Suffield, CT in the 110. This truck has a set ofBFG AT's fom my90. The 90 was bought with 70K miles on it and I put another 5K miles on these in the 110. They still had plenty of tread. Now I don't know if these were originals on the 90. I know they're a long lasting tread but who knows.
Anyways, took the Pike and 92S, all went well until we pull into the parking lot for my niece's soccer tournament. I hear a hissing sound, air leaking from the RR tire. Damn! Looking at it, it's not a flat but a tear in the sidewall - a substantial tear of 3-4 inches. A closer look revealed "crack" limes from the outer tread pointing in about 1-2 inches all around this tire.
The FR tire also looked prety bad so I got worried about making it home safely. I tracked down a local tire shop and bought a set of nwe ones.
Stepping back a bit - take out my trusty LR bottle jack, which has never been used, and it's low on oil! I can only raise it an inch! Fortunately a local lent me his mechanical minivan jack and I replaced the tire.
At any rate, picked up some fluid and filled both of them. However, I'm leaning toward the mechanical type. Sure, a hell of a lot more work, but a hell of a lot less maintenance.