What is the correct cold tire pressure ?

[HummerMann]

When I brought it home new from the dealer I noticed they had 36 psi in each tire - perhaps to soften the ride. Two months later I aired them up to 42 psi and got 57,000 miles out of them before putting the 37s on. I'm going back to the original BFGs after these wear because of the highway noise and stiffer ride. I do love the 37s in snow and mud, however, we haven't had much snow this year to test them out except for that early blast in October.