E rated psi?
#12
Senior Member
Thread Starter
#13
Senior Member
#15
Senior Member
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...
#16
Senior Member
I know the tires are over sized for the truck, i get that, i knee it when i bought them. I wanted a heavy sidewall, stumps, rocks and less flex towing heavy. My rear axle is rated at 3800, front 3460. The oem wrangler fortitude ht suck. Sorry if you dont agree. Nevermind
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:
Last edited by atwowheelguy; 07-12-2017 at 12:10 AM.
#17
Grumpy Old Man
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.
#18
Senior Member
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.
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.
I think I'm good to go. One slight wheel well rub so far.
Last edited by atwowheelguy; 07-12-2017 at 03:34 PM.
#19
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.