F-250 tire pressures

Terry, I had to contact GY for the chart for my current truck tires. They were quick to respond. I'd drop General a call or email. I bet you hear right back.

Thanks for all the helpful and informative responses. Still haven't been able to find a load/inflation chart for General tires. Current plan is to add air until light goes out and then have a long talk with the dealer when I go in for the first service.

Terry

taken wrote:
It may sound complicated but it's actually really easy Dave. Do a search on Forscan over on the Ford Truck Enthusiast forums. Lots of detailed info there and plenty of guys willing to help if you have a question.

X2.....

A few misconceptions about tpms adjustability here.
Yes, a dealer can, or used to be able to, adjust the tpms thresholds.
Following the advent of them on HD pickups, they used to be even some what user adjustable. (Dodge light load setting)
I've had them done or done myself on 13/15 model f250s and 14 model Rams.
Recently, ram Witech software updates have disallowed adjusting the, stupid, factory thresholds.
Not sure about Ford, but I suspect it's across the board, new safety regulations.
There is now aftermarket equipment appearing to do the same to combat this lack of adjustability.
Just more big brother saving us from ourselves. Sure my dad used to say the same about seat belts, but not apples to apples with not being allowed to adjust your tire pressure properly for your use/needs. Well you still can, you just have a constant reminder on the dash that the truck thinks you're wrong!

If some mfgs still have the capability to change them, a lot of dealers will deny their ability or willingness to do so.
Bottom line, ALOT more people running too high of pressures for the loads or empty 3/4 ton pickups just to keep an idiot light turned off.

Short answer, 7-8000lb pickup = 45-60 psi front depending on diesel vs gas and size of tires. Empty rear psi should be 35-45psi based on empty bed and size of tires, for proper load/inflation for "normal" driving.
Running super high rear psi in an empty truck will not technically hurt anything, to the degree under inflation will, but it will make the ride orders of magnitude rougher, less traction than it should have, and helps cause many "my truck squeaks" complaints.

It may sound complicated but it's actually really easy Dave. Do a search on Forscan over on the Ford Truck Enthusiast forums. Lots of detailed info there and plenty of guys willing to help if you have a question.

wow taken you are miles over my head, but that was a very informative post. i was charged 1/2 hour shop flat rate for the change.

Dave H M wrote:
Well folks here is what I did with my F250.

Took it to the stealer I bought it from and had a friendly chat with the service manager. He greed to set the TPMS lower to my spec, but i had to come back when his "computer whiz" stopped by. My dealing with that light is over, that is unless the pressure gets lower than what it is set at.

It can be done, ya just have to find the right folk to do it.

Exactly right Dave. Your Ford dealer can change the TPMS alarm threshold through IDS in about 45 seconds. I had it done to mine when my truck was new so I could run lower pressure in the off towing season. Some dealers refuse to do it fearing liability. However, you no longer need a dealer to make this change as well as others. There is a free Windows based program called Forscan which along with a BT OBD2 adapter, allows you to make these changes yourself. You can also change between factory tire sizes, gearset ratios, and so on. You're also allowed to enable the "ghost screen" DPF percentage until full screen on 6.7's. It's a great free program. Your only expense is the $80 BT adapter. Cheaper USB and WiFi adapters are problematic and most guys that try them can't make the changes they want.

rhagfo wrote:
You will get two schools of thought with tire pressure!

There is the group the believes that the yellow sticker is the do all for all loads. For most this is about 80 psi.

Then there is the group that use the yellow sticker as a guide for loaded, adjust for the unloaded condition. Running lower rear pressure when unloaded based on weight, this will improve traction and tire wear.

I am with the second group, instead of adding weight to the bed to reduce tire spin, lower tire pressure to get a better contact patch.

My experience is to run the recommended tire pressure on the door panel which provides a good compromise on ride quality, tire life, and fuel economy. My Super Duty sticker states 65 psi on all tires and that's what I run.

Also on 4 wheel drive trucks with a solid front axle is more prone to exhibiting the death wobble on lower tire pressure on the front tires. In addition it's been my experience that I can get more miles out of a set of tires by running the door sticker tire pressure vs running less pressure.

riven1950 wrote:
Mich800, sorry did not think that there would be a difference, especially with a newer model year.kind of strange. Seems the f250 tpms would need to be more flexible than on a f150. My bad.

I didn't mean it as a dig on you. But many of the tech we take fir granted on the half tons is just now trickling up to the to the bigger trucks

You will get two schools of thought with tire pressure!

There is the group the believes that the yellow sticker is the do all for all loads. For most this is about 80 psi.

Then there is the group that use the yellow sticker as a guide for loaded, adjust for the unloaded condition. Running lower rear pressure when unloaded based on weight, this will improve traction and tire wear.

I am with the second group, instead of adding weight to the bed to reduce tire spin, lower tire pressure to get a better contact patch.