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I think you are mixing a few things up. Read this first especially the charts at the bottom and compare them to why (D) is called out where they are in the inflation pressure charts
This is a truck forum and thought you should show some of the new guys what you were trying to point out.
If I am wrong, I got the guys to inflate their tires to the factory recommend psi, truck and tire manufacturers on the whole planet have written on the doors pillar and sidewalls. That is for E rated tires on Super Dutys.
If you are wrong, someone can lose control and possibly crash if they run at a lower psi like 50 psi on tires with 2,840 pounds of cargo.
That side to side marshmallow feeling will be fun if in a curve or quick obstacle avoidance. Feels like slipping on ice. When the sidewall rolls under the wheel with all the weight in the bed you better have practiced your drifting maneuvering.
This is a truck forum and thought you should show some of the new guys what you were trying to point out.
If I am wrong, I got the guys to inflate their tires to the factory recommend psi, truck and tire manufacturers on the whole planet have written on the doors pillar and sidewalls. That is for E rated tires on Super Dutys.
If you are wrong, someone can lose control and possibly crash if they run at a lower psi like 50 psi on tires with 2,840 pounds of cargo.
That side to side marshmallow feeling will be fun if in a curve or quick obstacle avoidance. Feels like slipping on ice. When the sidewall rolls under the wheel with all the weight in the bed you better have practiced your drifting maneuvering.
I run 30 to 35psi empty. 50/65 loaded.
Lil SRW tires: 65-70 front, 88 rear, towing heavy.
Door sticker is for noobs, and doesnt cover the needs of people living in the wilderness or a farm.
Last edited by Midwest87; Dec 27, 2025 at 07:38 AM.
Lil SRW tires: 65-70 front, 88 rear, towing heavy.
Door sticker is for noobs, and doesnt cover the needs of people living in the wilderness or a farm.
Trying to figure out what you are doing different on your farm compared to our farms?
Rather large ranch in Montana and 7k acre farm in North Dakota.
At the Montana ranch, hardly ever seen pavement, but hard packed dirt roads (lots of off-road).
ND is mostly off-road through field roads and pavement.
Only time we would air down a little was during hunting season or when chains would be needed. 60/80 was the norm with heavy loads which was pretty much constant with fuel tanks/trailers.
We never ran dually trucks. If that kind of truck was needed, the semi's got fired up. Recent addition to the other 7 trucks.
I do what lincster suggested. I weighed the truck ( empty and loaded) and I adjust my tires accordingly.
When I'm towing several times a week, I'll just them imflated and put up with the rough ride. But if I know I'll be a couple week with out towing. I let some air out
I run 55 psi empty and 65 front and 75 rear when I'm towing.
Trying to figure out what you are doing different on your farm compared to our farms?
Rather large ranch in Montana and 7k acre farm in North Dakota.
At the Montana ranch, hardly ever seen pavement, but hard packed dirt roads (lots of off-road).
ND is mostly off-road through field roads and pavement.
Only time we would air down a little was during hunting season or when chains would be needed. 60/80 was the norm with heavy loads which was pretty much constant with fuel tanks/trailers.
We never ran dually trucks. If that kind of truck was needed, the semi's got fired up. Recent addition to the other 7 trucks.
35x12.5r18 e rated RT's. Max load of 3417 at 65psi.
Door sticker is for stock only. And doesnt account for the actual weakness of the cheap OEM tires, or the a true weakness of SRW stock sized tires. Henceforth the recommendation of going 10% over max pressure on the rears for heavy loads. Chat with your eng, and he'll gladly tell you the woes that go into that lame sticker. Follow it blindly, at your own risk. Reduce pressures unloaded, but keep rears over the fronts, to reduce the trucks massive understeer.
Really, with that load, and the inability to think past a sticker, youre far better off with a DRW.
My evil Econoline 350 spent its whole life with 88 in the rear. What a pathetic vehicle. Sidewalls all bowed out and crushed. Tires didnt have enough surface area, too skinny, to lift the loads they were supposed to. An absolutely horrid vehicle that Ford should be shamed for.
Last edited by Midwest87; Dec 28, 2025 at 06:17 AM.
35x12.5r18 e rated RT's. Max load of 3417 at 65psi.
Door sticker is for stock only. And doesnt account for the actual weakness of the cheap OEM tires, or the a true weakness of SRW stock sized tires. Henceforth the recommendation of going 10% over max pressure on the rears for heavy loads. Chat with your eng, and he'll gladly tell you the woes that go into that lame sticker. Follow it blindly, at your own risk. Reduce pressures unloaded, but keep rears over the fronts, to reduce the trucks massive understeer.
Really, with that load, and the inability to think past a sticker, youre far better off with a DRW.
My evil Econoline 350 spent its whole life with 88 in the rear. What a pathetic vehicle. Sidewalls all bowed out and crushed. Tires didnt have enough surface area, too skinny, to lift the loads they were supposed to. An absolutely horrid vehicle that Ford should be shamed for.
I understand why now (what you are doing).
My factory tires are load index 126 (3748 lbs per tire) those have always been more than adequate for anything my trucks should be doing...by a lot. My break in tow was 17k lbs behind me and I wasn't even into the overload springs yet. If I am towing much more than that, I've selected the wrong tool for the job.
Until I get my ForScan set up, I have to keep 71 or more psi in the rears anyways so I don't get those tpms alarms. Doubt I would ever drop below 65 psi anyway.
I have to keep 71 or more psi in the rears anyways so I don't get those tpms alarms. Doubt I would ever drop below 65 psi anyway.
You might keep air in the tires at recommended but as a long nose driver I bet you don’t have the recommended pressure in that driver seat lol. Just enough to peek over the dash. Anytime I have to move someone’s 359 or W900 in the yard I have to get the seat off the floor. As a T680 owner I’m not allowed to run that low 😜
You might keep air in the tires at recommended but as a long nose driver I bet you don’t have the recommended pressure in that driver seat lol. Just enough to peek over the dash. Anytime I have to move someone’s 359 or W900 in the yard I have to get the seat off the floor. As a T680 owner I’m not allowed to run that low 😜
You might keep air in the tires at recommended but as a long nose driver I bet you don’t have the recommended pressure in that driver seat lol. Just enough to peek over the dash. Anytime I have to move someone’s 359 or W900 in the yard I have to get the seat off the floor. As a T680 owner I’m not allowed to run that low 😜
Originally Posted by ATC Crazy
Yeah, but is the shifter touching the roof?
The man that drives this truck is 6'5" and 268 lb corn feed farm boy. So yeah...seat on the floor and I would have to climb up a rope to shift. 🤣🤣
