charles_slc

On my 2013 w/HDPP, factory is a load range E (LT245/75R17E)
55psi in front
60psi in rear

Charles

Deerchaser

Normal unloaded pressures? Thank you.

charles_slc

Yes, that's from the door sticker.

Technically I suppose that PSI should handle the full load.

Norotso

I'm running 42 psi on my GY Duratrac and like the ride so far. Had 55 rear and 50 front while hauling material for a home project.

11screw50

On my last truck, I needed 48psi for the E-rated tires to carry the same load as the P-rated tires could carry at 35psi (they were the same size)...and that was more than the rest of the components were rated to carry...

atwowheelguy

I gather that the Wranglers were not LT tires and didn't do what you wanted. Nothing wrong with excess capacity. It surely makes inventory sense to deflate a high load capacity tire rather than build multiple Load Ranges for the same size tire. I suspect that the lower load range tires would have a more flexible sidewall for a softer ride.

I'm reading that the steel body HDPP F150s came with LRE LT tires at 55 and 60 psi. I've never had any LT tires, so I don't know how differently they perform when driving. The Michelin P tires have always done what I wanted them to do.

I'm in favor of excess capacity in trailer tires.
My tandem trailer axles together weigh 5,960,
are rated for 7,000,
came with tires rated for 7,280 at 50 psi,
and I bought replacements rated for 10,160 at 65 psi.




2013 F150 HDPP tires:

smokeywren

Me too, but there are a couple of gotchas.


The ST205/75R15C came on wheels that are 5.5" wide. But the ST225/75R15D requires wheels at least 6" wide. So you cannot simply mount new tires on the old wheels. You have to buy new wheels too. I ordered new trailer wheels from Southwest Wheel:
https://www.southwestwheel.com/p-412-128696cbr.aspx


Plus the ST225/75R15s are taller and wider than the ST205/75R15s. The bigger tires barely fit in the wheel wells of my trailer, and rubbed against the under side of the fender well when hitting bumps or dips.

atwowheelguy

You are correct, sir. My camper came with four 6" wide aluminum wheels on the ground, but the cheapskates only put a 5" wide steel wheel on the spare. Maxxis says that 5" is OK, but not the preferred size for the ST205/75R15. I bought all five tires new, so I replaced the 5" steel spare wheel with a 6" wide wheel. The 225s are 1.2" larger diameter than the 205s, so 0.6" closer to the fender wells.

I think I'm good to go. One slight wheel well rub so far.

dlbb

gonna second this for my 14 lariat hd. and nowhere did they say to go higher for heavier loads. i had put 2k+ lbs in my 14 and never an issue. and i recommend supersprings if to are going to +500lbs loads often. they also keep the body flatter at all times too.

atwowheelguy

No need for higher pressure because they are rated at 2430/2540 at 55/60. That's higher than the axles are rated for.