i got a new set of wheels and tires from a brand new Lariat. the size is 275/60/17. I checked the pressure with a digital pressure gauge and it all registered 41 psi. the max psi for the tire written on the sidewall is 35. i let some air out down to 35 and now the tires seem to be bulging out too much (looking like needing some air) and at night, it sounds like mickey thompsons. should i pump it back up to 41?

------------------
2000 EXPEDITION 4.6 3.31 Rear, AIRAID Fipk with Poweraid Spacer, UltraFlow muffler, 82 mm Mass Air Flow Sensor housing w/ stock sensor, 6.8 inch TV with tuner/VCP, Full alarm and Auto-Start, Daytime Running Lights

New Addition:

2001 F150 SUPERCAB 5.4L 3.55 LS, Airaid FIPK, 82 mm MAF sensor billet aluminum housing w/ stock sensor, Full alarm and auto-start, 50 series 3 chamber 3inch in/out Deltaflow Flowmaster
Swept Side style, Beltech 2 inch rear shackles, SUPERCHIP, billet grille, Lariat wheels and tires (275/60/17).

COMING SOON:
pulleys, remove cats, 2 inch drop all around.