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what tire pressure?

PHS79
Explorer
Explorer
I just had new tires put on my truck and now I am trying to figure out what pressure I should be running, here is the info. My truck is a 2004 F150 FX4 supercab, 6.5' box, the truck came stock with 275/65/18 which were load range C with a rating of 25XX lbs at 50 psi. After I put a small lift in I ran Nitto Terra Grappler 325/60/18 load range D rated at 3000 lbs at 50 psi, I ran them at 50 psi rear 45 psi front and they wore really good. I am now running Cooper STT 325/60/18 load range E rated at 3525 at 65 psi.

I was thinking about running them at 50 psi, maybe +/- 5 psi, since I don't need the full weight capacity of them. What do you think?
2004 F150 FX4, with lots of mods and way too much money dumped into the truck for said mods
2013 Passport 3220BH
old TTs:
2012 Grey Wolf 26BH
2001 Kodiak K215
4 REPLIES 4

Atlee
Explorer II
Explorer II
Ford's sticker on the door pillar says 55# up front & 60# in the rear. The truck came with LT245/75R17 LR E.
Erroll, Mary
2021 Coachmen Freedom Express 20SE
2014 F150 Supercab 4x4 w/ 8' box, Ecoboost & HD Pkg
Equal-i-zer Hitch

Bendder
Explorer
Explorer
I don't run as big a tire but tey are E rated tires on my F150 and run 40psi empty and50psi front and 65psi back when pulling rides nice at these essures but gets rough if I go higher when pulling.
Mark

2011 F150 SCrew Ecoboost max tow max payload
2013 Cougar High Country 329TSB

lbrjet
Explorer
Explorer
I would lower the pressure to 45. The rating at the pressure is 27xx per tire.
2010 F250 4X4 5.4L 3.73 LS
2011 Flagstaff 831FKBSS
Equalizer E4 1200/12000

scrubjaysnest
Explorer
Explorer
Load the truck for a normal trip and weigh it. Then use those axle weights and see what Cooper says for those tires and axle weights.
I run my E load range Toyo A/t's at 50 psi fwiw.
Axis 24.1 class A 500watts solar TS-45CC Trimetric
Very noisy generator :M
2016 Wrangler JK dinghy
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