The BFG T/A's are a radically different tire than the light weight P-rated Ragged Trails.
With T/A's you are going to need to run around 45lbs to avoid bad wear. I run mine at 50lbs, and boost it 70lbs when towing or carrying large loads.

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2007 Tundra DC Limited 5.7L 4X4
TRD,NAV,TOW
Xlerator Exhaust
aFe Stage 2 CAI
BFG AT/KO 285/65/18
Desert Sand Mica