15fx43.5

I have 20" Lariat sport wheels on my supercab 4x4 just wonder what psi you guys are running? I know the sticker on door jam says 35 psi but it looks low to me.

COBRAJOE

I bumped mine to 38 psi hoping for a little better fuel economy.

15fx43.5

I have mine at 37. 35 looked to low to me

Lare

I have the 17" wheels and the door sticker says 35. When I took delivery they were at 45. I didn't notice for several days (I thought the TPMS screen was due to heat expansion) but I've aired down to 35. I don't notice much of a difference and may bump them back up a bit for mileage.

I thought 35 looked low, too, but have to believe that Ford would get that right.

adamg8504

Being a tire development engineer, I would stick with the placard tire pressure found on the driver door jam. This is the pressure that the vehicle and tire was designed around.

Each (well most) OE tires goes through several rounds of development with the vehicle supplier to arrive at the best possible fit for that vehicle. You'll usually not find a better match for your vehicle unless it is just pure luck.

Jedi_1

Mine are at 45, while the placard might state otherwise, not only did I start to get outer tread wear at 35, but after talking to a few Goodyear people, they stated the tires were low and 45 was fine.

15fx43.5

Ok I figured cause if you read the tire is says a max of 50 psi. I was thinking 40ish