With the 265/65/18 Hankook ATMs I have on my truck now, 5 pounds less than the 50 PSI max listed on the sidewall data, in cool/cold weather. Summertime, 8 pounds less.
Had a set of BFG AT KOs on a half ton 4x4 back in 2002. Ran 'em at whatever the max sidewall pressure was. At maybe 50K miles and running the truck hard on a four lane, one front tire literally exploded. Ain't owned a BFG since. FWIW, they weren't worth all that much in deep mud or snow and that truck saw plenty of both.
Preach!
