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Tire pressure- 2020 F250

Old 10-12-2020, 07:33 AM
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Default Tire pressure- 2020 F250

When we purchased our current boat in May this year (2019 Scout 300 LXF) we had to upgrade tow vehicles so we now have a 2020 F250. Question is, we previously had a big 43ft diesel motorhome where you ran tire pressures based on total weight. In regards to the F250, do you run tire pressures to the recommended cold amount listed on tire or what is everyone doing? If it matters my boat & trailer combined weight is about 13,000 lbs and I have the stock tires that came with the truck (Michelin LTX A/T2 LT275/65R20- show 80 cold tire pressure).

Thanks for any input!

-Brian
Old 10-12-2020, 07:39 AM
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What does the manual say?

Usually you will run something like 60psi front 45 psi rear unloaded and you pump the rear tires up to 70 or 80 depending on load
Old 10-12-2020, 07:56 AM
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Unless under heavy load max out the air...otherwise 50lbs is fine....max pressure with no load you will bounce around with a shitty ride and wear the inner tread out.
Old 10-12-2020, 10:12 AM
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Originally Posted by dell30rb View Post
What does the manual say?

Usually you will run something like 60psi front 45 psi rear unloaded and you pump the rear tires up to 70 or 80 depending on load
From what I've seen there is nothing specifically published showing a scale of tire pressure, they just note to run what is on the door label. I was curious what others were doing with F250's and similar boat/trailer weights. I have the boat/trailer at my dealer working on the correct tongue weight as it was first too heavy and now too light...just trying to get my setup the best it can be for longer hauls.
Old 10-12-2020, 10:14 AM
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If you run less than 65psi in the rear, the TPMS sensor is going to go off. And if you have a shitty ride, your tires aren’t balanced or are worn. It’s a 3/4 ton truck, if you want the ride of a 1/2 ton or car, should’ve bought a 1/2 ton or car.
Old 10-12-2020, 10:14 AM
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What does the door sticker on the truck say. Use that information always.

Old 10-12-2020, 10:44 AM
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Originally Posted by FL Bill View Post
What does the door sticker on the truck say. Use that information always.
you don't need those high of pressures unloaded though. sticker pressures are for max load carrying capacity.

best thing is grab some chalk and figure it out based on how you generally drive the truck. get an even wear pattern and write down the pressure. chalk disappears in center, reduce pressure. chalk disappears on edges, increase pressure.
Old 10-12-2020, 11:10 AM
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I run 50 in front and 45 in the rear in my 2019 F250. TPMS light stays on but it doesnt bother me. Lowering the pressures totally transformed how the truck rode and tracked on the highway. Tires are wearing even after 10,000 miles. I tow a 5K boat using the same pressures.
Old 10-12-2020, 11:19 AM
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I run 80lbs of air, helps with treadwear and load capacity, you sacrifice ride tho

Last edited by dawgsfish; 10-12-2020 at 11:57 AM.
Old 10-12-2020, 11:32 AM
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There's some law about 10k GVWR trucks required to be 80lbs rear. Older 10k trucks (I know Rams for instance) used to have a TPMS mode for loadad\un-loaded. When you put it in un-loaded, the TPMS allowed 50 rear I think.

But some hippies in CA forced the law to be changed, and now that setting is gone. 3500 trucks (>10k GVWR) don't have TPMS, they just have TPLS....basically just show you the pressures. No warning lights though
When I ran 80lb un-loaded, not only was it extremely firm, if you spun the rear tires on concrete, and looked at the contact patch.....it like 3" touching the ground.



Old 10-12-2020, 12:02 PM
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Originally Posted by 25WildBlue View Post
3500 trucks (>10k GVWR) don't have TPMS, they just have TPLS....basically just show you the pressures. No warning lights though
The F350 has a warning light and alarm.
Old 10-12-2020, 12:37 PM
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Originally Posted by kawakx125 View Post
you don't need those high of pressures unloaded though. sticker pressures are for max load carrying capacity.

best thing is grab some chalk and figure it out based on how you generally drive the truck. get an even wear pattern and write down the pressure. chalk disappears in center, reduce pressure. chalk disappears on edges, increase pressure.
Oh yeah. That is the way Ford says to do it too. No. It is not. Ford will tell you the same thing I said. Unless OP changed stock wheels he should follow the recommendations of his owners manual.

Loaded or not, the tires pressure should be the same. To think you change tire pressure dictated by load is absurd.

Properly inflated tires will run cooler and last longer. And of course the vehicle will handle as the manufacture designed it to.

If you can show me that information in the owners manual I will buy you a beer. I have never heard that. Either way I would buy you a beer...lol Maybe I just want to drink..hmmm
Old 10-12-2020, 12:52 PM
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Thanks everyone for the replies. I was not starting this thread to complain that my truck wasn't riding well. I actually think it drives great for non-towing city driving and as good as I think you can expect for towing 13k pounds. More so as I noted I used to have a large 43ft 50k lbs diesel motorhome and we ran tire pressures not to max but to a tire chart based on actual axle weights. Being that all my other boats have been 5,000 lbs or less I was curious if there was any difference now that I'm trailering 13k pounds. We have had some issues getting the correct tongue weight but overall I've been very pleased with the F250 & pulling the boat.

When you all mention the truck sticker, the one thing that is odd to me is my 2020 F250 sticker says 60psi for front & 65psi for rear but the stock tires on the truck show 80psi cold on sidewall...

Appreciate all the replies though!
Old 10-12-2020, 01:08 PM
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The max pressure stamped on the tire is the maximum pressure the tire can physically withstand per the tire manufacturer.

The door sticker is the vehicle manufacturer's calculation of the correct pressure for proper tire contact with the road based on the rated load and the factory installed tire size. If you are using the OEM tire size, you should use the value on the door sticker. There is nothing wrong with measuring the contact patch and going with less if indicated when the truck is unloaded.

Last edited by scooperfl; 10-12-2020 at 01:14 PM.
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Old 10-12-2020, 01:20 PM
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Go with the manufacturers specification. Always.

They designed it, built it and tested the hell out of it. Adjusting inflation based on load may affect handling, braking, cause hydroplaning etc,

My $.02.
Old 10-12-2020, 01:30 PM
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I adjust mine down unless towing. I want to say I run 45/55 rear/front. Rides like shit otherwise.
Old 10-12-2020, 01:58 PM
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Originally Posted by Apexwarrior View Post
Go with the manufacturers specification. Always.

They designed it, built it and tested the hell out of it. Adjusting inflation based on load may affect handling, braking, cause hydroplaning etc,

My $.02.
Sounds good, appreciate it! I've been running at what sticker shows so I'll keep with what I've been doing. Just wanted to confirm I was going down the right track since this is my first larger boat to trailer. I've been trailering for 20+ years but all others were 5k or less.

Thanks again everyone!!
Old 10-12-2020, 02:13 PM
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I had 35-12.50 Toyo AT II on my last F250 and I ran them at 50#'s for the best ride quality except when towing then 80.
Old 10-12-2020, 02:57 PM
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I run max 65 when towing my skid steer. I did the chalk test on mine and unloaded I run 55 or so. Sometimes I am lazy and just leave them at 65. Can’t tell a difference in the ride either way really. Only have 11k on truck but they seem to be wearing evenly.
Old 10-12-2020, 03:14 PM
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Originally Posted by saltydog235 View Post
If you run less than 65psi in the rear, the TPMS sensor is going to go off. And if you have a shitty ride, your tires aren’t balanced or are worn. It’s a 3/4 ton truck, if you want the ride of a 1/2 ton or car, should’ve bought a 1/2 ton or car.
I have a 2020 F250. Door sticker says max is 60F/65R. I run between 55/60 and no light. It dont come on until it drops to around 50.

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