My understanding between ST and LT tires is the sidewalls on the ST has more I support than LT tires. That been said I put BFG Commercial load range E on my PP. I pump them up to max tire pressure and TPMS and I am a happy camper. One note might be if you had a toy hauler with a third axle there would be more twisting on the tires in a turn.
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George and Debi
2006 F250 PSD, 2005 PF30CK
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