Recommended tire air pressure for 275/40/17's & 315/35/17's?

[BurningRubber]

How do they hook at 30 psi? Im pretty sure 42 psi is part of the problem I cant find traction in first or second gear.

 

[stangman]

fwiw man, I ran 35lb's in mine when i had those tires out back & they wore great, nice & even

 

[Tally_4.6]

Wow 42 psi?? Lower that as soon as you can, I set my 275/40, 315/35 setup at 30 psi all around.