I know this has been discussed several time. And i searched and couldnt find a good answer. I got a set of Firestone Destination LEs in 265/70/17. The stock size is 255/70/17 at 35 psi. What would the correct pressure for the 265s be to keep proper tire wear? is the 35 psi still a correct pressure? Thanks!

 

It should be close.....but the best way to determine that is put some paint on the treads and let it dry.....go drive around the block and see if its wearing off evenly.....

 

For what it's worth my truck came with 265/75/18's and also calls for 35psi.

 

As mentioned, wet the tires and drive slowly in a straight line to see if the tire footprint is making a full print. I also keep an eye on my tires to make sure they are wearing evenly. Outside tread wearing faster...not enough air. Inside (middle) tread wearing faster... too much air. I also get my tires rotated at recommended intervals, and my BFG KO's are wearing perfectly. I usually get them balanced because a lot of times a weight is gone or the tire has changed. I've bought all of my tires at one place, and they will do all of this for free, but tips are appreciated.

 

I keep mine at 40

 

It depends on the tires rating the load range of the tire. A load range D and a load range E has 2 different psi settings. Doesn't your tires tell you the psi on them?

 

Remember that the tire pressure shown on the side wall is the max pressure to achieve the max rating of the tire. This is not what you need to safely run your tires when the vehicle is not at max load capacity.

Bumping up one tire size, you're fine running the stock pressure recommendation. Ryan's method of checking for full contact will tell you if 35 is ok. Which I'm sure it will be.

 

Really?
Go with the tire pressure is on your door post. Then watch the wear and alignment issues.
We all should be doing that anyway.
My F150 HD calls for 60lbs. I run load range E and 285/70/17 at 55lbs in the front and 50lbs in the rear unless I have a have a heavy load then it is 65 in the rear. This is a larger than stock tire.
You have to watch your tire if you want to get a longer usage life from it.