Tire pressure
04-01-2022, 10:25 PM
#12
Senior Member
The psi you set should be matched to the weight the tires are carrying. Too little psi and the tires prematurely wear out on the edges, too much psi and they prematurely wear out in the center. Generally, 37 rear and 40 front psi is ballpark for an unladen half-ton truck with LT tires. Rear can go up to 45-50psi max for when your truck is heavily loaded (and i mean right up against your gvwr). Anything above 50psi is overkill always. Those pressures support loads meant for superduty trucks that you will never carry as you would exceed your gvwr (exceeding your firame, axle, and wheel load capacities). You can use a website like https://tirepressure.com/tire-sizes to help you find the correct psi.
I know in later years Ford scaled back the LT tires to LRC.
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Bratwurzt (04-05-2022)
04-01-2022, 10:29 PM
#13
In 2014, Ford disagreed. My 2014 F150, XLT, SCAB, 8' box, Max Tow and HDPP came with OEM LT245/75R17 LRE BF Goodrich AT tires. The yellow label on the door calls for 55# front axle and 60# rear axle. It also came with a Rear GAWR of 4800#.
I know in later years Ford scaled back the LT tires to LRC.
I know in later years Ford scaled back the LT tires to LRC.
04-01-2022, 10:34 PM
#14
Senior Member
04-01-2022, 10:38 PM
#15
Amazing how much of a difference the aluminum has made now. The newer HDPP have what 7,800 GVWR and realistically like 2,800 lbs payload/cargo.
I should have known right away 7,800 was too low a guess since that's what the newer ones often have with HDPP.
04-01-2022, 10:54 PM
#16
In 2014, Ford disagreed. My 2014 F150, XLT, SCAB, 8' box, Max Tow and HDPP came with OEM LT245/75R17 LRE BF Goodrich AT tires. The yellow label on the door calls for 55# front axle and 60# rear axle. It also came with a Rear GAWR of 4800#.
I know in later years Ford scaled back the LT tires to LRC.
I know in later years Ford scaled back the LT tires to LRC.
As OP didn't state their tire dimensions I definitely could have understated the optimum inflation pressures. I was generally assuming 265-275 width range. OP please use the tirepressure website to guide you to the correct values.
04-02-2022, 01:40 PM
#17
Senior Member
Might be a moot point since tire size wasn't referenced, but there's also a ride quality factor in finding the pressure you want to run. Besides the soft ride vs hard riding tire pressure difference, sidewall flex also is relevant to the pressure you're running. When I went from a 65 to 70 sidewall and LT E rated tire, I found they had too much sidewall flex for my liking when driving twisty roads at the door sticker 39 lb's. Once I got above 44 they started handling better. I get big temperature swings (40-50 F degerees aren't uncommon) where I live, and tire pressures change by 3-4psi quite often. All that said I'm now setting my 275/70/18 LT E tires at 45psi cold all around, and will go up to 49psi when loaded and towing my trailer more than a short distance. I've got about 22k miles on these tires, and they're all wearing evenly.
06-06-2022, 11:28 AM
#19
You have a brain unlike a lot in this thread, you go by what the sticker on the truck says, not the tire. You don't need to do higher pressures just because you have an E rated tire or whatever like some people are spouting.
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BlkNBlu (02-15-2024)
