Mike Up wrote:
go jets go wrote:
I have pretty much the exact same truck as you except mine came from the factory with the Goodyear Wrangler ATS load range C tires. They are supposed to be inflated to 40psi according to the sticker on the door jamb.
Wow, at 41 psi, I had vibration, noise, poor mileage, and they felt flat with it harder to accelerate than normal. I put them to 55 psi as to what BFGoodrich said, and they felt great. My mileage went up about 2 mpg, vibration went away, tires didn't feel flat and acceleration the same as with OEM, and tire noise went away.
I'm really surprised at 40 psi because the load rating on a LT tire is so low, I can't believe Ford would do that.
What payload rating did they give you on the tire placard?? Also, what axles to you have. I have 3750 lbs front axle and a 3850 lbs rear axle.
That 40 psi blows me away. How's your ride and do you get decent mileage with the tire aired that low??
A member at the F150 forum took a pic of tire loading sticker on his F150 HD Payload package truck. That truck has a 4050 lbs front axle and a 4800 lbs rear axle. The truck comes with LT245/75R17E tires. His placard states 55 psi for the front 4050 lbs axle and 60 psi for the rear 4800 lbs axle.
Thanks for the help.
Well based of your empty weights you need to work to get the right pressure. while 40 might be a bit low, I would think for your load (empty) 55 psi is too much, I would be looking at between 45 and 50, and and maybe 55 to 60 in the rear loaded.
You can always run the chalk or tape test on the tires to see tread contact. Keep in mind those tires are capable of carrying about twice the GVWR of your TV. :B
