well bit the bullet and bought four new BFG m/t 255/75/17 for 568 plus 90 for shipping should be here in a couple days ill post pics then. how bad will this kill my mileage? lol i plan to do 4.10 gearing once i get the cash

 

well they are 32.1 x 10 inch so probaply wont be too bad, when i went to my 33x12.50's, i only lost .5 mpg's. just make sure you recalibrate correctly for the new tire size, or it will be way off

 

thank you i should be installing my tranny cooler today or tommorrow. and DT75 your truck amazing btw. whats a good psi for on road?

 

i normally start with the pressure that is on the tag on the inside of the driver door, then adjust from there, between your ride quality and wear, if you start wearing the centers=to much psi, and wear on the edges=not enough psi. its always a big guessing game with new and bigger tires, just keep a good eye on them.

 

instead of inside the door, shouldn't you go by what is stamped on the tire? I figure, the tire manufacturer would know better than Dodge.

 

only thing stamped on the tire is the maximum psi they can operate at with out exploding, running at the max (on these light truck tires anyway) will give you a rough ride and wear out the center of your tires, dodge does know better in this case because the pressure is set for the weight of the vehical, thats why i said start there, then adjust if you have too

 

thankkkk you lol

 

I think our trucks say 35 psi front and rear. I usually stick around 38-40 for a little better highway mileage. Also it keeps the tread a little more even for my truck.

 

How do you recalibrate for the different tire size?

 

A Tuner or the Dealership, is your best bet