I just got the Centerline Crossfire 20's with Nitto Terra Grappler 305 55 20's. The max tire pressure listed on the sidewall is 65#.
I currently have 52#'s in them now and it feels a little hard.
What pressure should I run?

Thanks in advance for answers!

 

Mine are not quite as wide as yours but the people that installed my wheels and tires put 36psi in each of my tires and they are 20s. If I were you I would try 40psi first, look at the sidewall and make sure the sidwall isnt too flat looking. If not try it and continue to adjust until you find what is best.

 

Thanks Greyflare. I thiink I will go down from 52#'s to somewhere in the 40's. I E-mailed Nitto Tire yesterday to see what they say, but no response yet.

 

Oh, BTW- I read on some tire website (I can't remember which one) that even if you change your rims and tires you should still go by the recomended tire pressure for the stock wheels/tires. So, this would mean that I put 35#'s in. Yeah right, I tried that and the Nittos looked half way flat!

 

04SCREW98COBRA,

Don't go by how the sidewalls look. That used to work with the old bias ply tires, but it can fool you with radial tires.

Try this little test. Start out with about 40 psi.

Use a bucket or garden hose to wet down part of your driveway, street, or parking lot. Then drive through the wet part and over the dry part. The idea is to make wet tire tracks on the dry part.

If the tracks are narrower than your tire tread, the pressure is too high, and is raising the edges of the tread off the ground.

If the center of the track is faint, the pressure is too low, and the center of the tread isn't making good contact.

When the track is well formed, and duplicates the tread on the tire -- then the pressure is just about right.


John

 

Thanks for all the info guys!

I called Nitto today and told them the specifics about my truck, and the wheels and tires. The guy told me to put the same psi as if my truck had the stock tires, 45 ft 65 rear. I told him that my truck actually called for 35psi for all four tires because I had the BFG Rugged Trails. He told me to hold and then came back and said to put 35psi in all four wheels! I think this is pretty funny because WTF is the difference what tires i had on the truck before? If I had the LT's, put 45 and 60 but if I had the BFG's put 35 in all four?
I will try to run about 40psi and will do the "driveway test" and see what happens.

Any other ideas would be appreciated!

 

i have 275/45 and im runni 35psi in mine