Here is one that will tip you on the mechanical abilities of my humble person:

I just equiped my truck with 4 brand new Wrangler Territory tires. Yesterday I went checking air pressure, they were at 55psi. So I look up on the tire's sides and it says 80psi maximum. I do find all these numbers kind of high, so I went looking at the sticker on the the door panel: it, in turn, says maximum tire pressure should be 35psi.

So who do I believe here? Anyone can educate me on the subject?

Thanks

 

Go with what's on your tire imo.

 

There must be an explanation for these discrepancies between directives. 55psi is most probably the pressure that was initially put in by the installators, why is that? Thanks

 

Well I would say the sticker on the truck is for the stock tires. The 55psi was probably because it's summer and hot air in hot tires expands.

 

Spec on door was for the original speced tire.
Go with tire rating 65-70 unloaded, loaded 80 cold.
U will get best wear keeping it closer to max

 

I got bfg ta with 80 max, I go 40 to 44 anymore it rides like he'll hitting bumps. I wouldn't recommend near what tire says.


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Unless the tires are a seriously different type than the originals, stay with the door placard. The "80 psi" is likely the maximum mounting pressure. That is, while seating the bead, don't exceed 80 psi. 55 psi is too much for everyday driving. You'll find them wearing down the middle over time.

 

The door sticker is from the factory for the stock tires it shipped with. I've always heard and read (I've seen a few charts out there that actually break it down by front and rear axle weight) right around 65% of max stated on the tire for daily driving, and 80% (or more as needed) if towing/hauling.

 

The sticker is for P rated tires... that number is now useless with your LT tires. 50-60 seems to be a good range for most and I air up to about 65 since I use my truck a lot for more than getting groceries. I don't think you'd ever need to go up to 80 tho unless you've got a yard of gravel in the back.

 

I agree. My Cooper LTZ's are XL Load rated and there's no way I would ever put 60psi in them! I run 35psi in every tire I have ever owned. Perfect for my liking/riding habits.
I had initially put in 40psi and the truck was noticeably different. It road like a lumber wagon and bounced all over. That 5psi drop to my usual pressure made a big difference. I even had stock tires at 35psi when they came off.

I thought the stock tires are LT tires. They are very soft LT tires, but I didnt think they were (P) Passenger car tires. Wrangler HP Pretty high load rating for P tires. Been awhile since I had them.

OP, I'd drop down to about 40psi. That 80psi is for maximum carrying load and universalness for different vehicles. You have a 1500, if you had a 2500, I'd say 60psi is where you want to be because of the heavier weight of the frame/truck itself plus the additional carrying capacity.
I dont think any 1500 should be above 50psi regardless of tire make/model. There's just not enough weight to squish the tire to the ground properly.